Mersedes Maybach S-Class. Service Manual — part 23

Jump-starting

For the jump-starting procedure, use only the jump-starting connection point in the engine com-

partment, consisting of a positive terminal and a ground point.

All vehicles except Mercedes-AMG vehicles:

G

WARNING

Battery acid is caustic. There is a risk of injury.
Avoid contact with skin, eyes or clothing. Do not inhale any battery gases. Do not lean over the

battery. Keep children away from batteries. Wash away battery acid immediately with plenty of

clean water and seek medical attention.

G

WARNING

During charging and jump-starting, explosive gases can escape from the battery. There is a risk

of an explosion.
Particularly avoid fire, open flames, creating sparks and smoking. Ensure there is sufficient ven-

tilation while charging and jump-starting. Do not lean over a battery.

G

WARNING

During the charging process, a battery produces hydrogen gas. If a short circuit occurs or sparks

are created, the hydrogen gas can ignite. There is a risk of an explosion.

R

Make sure that the positive terminal of a connected battery does not come into contact with

vehicle parts.

R

Never place metal objects or tools on a battery.

R

It is important that you observe the described order of the battery terminals when connecting

and disconnecting a battery.

R

When jump-starting, make sure that the battery poles with identical polarity are connected.

R

It is particularly important to observe the described order when connecting and disconnecting

the jumper cables.

R

Never connect or disconnect the battery terminals while the engine is running.

G

WARNING

A discharged battery can freeze at temperatures below freezing point. When jump-starting the

vehicle or charging the battery, gases can escape from the battery. There is a risk of an explosion.
Allow the frozen battery to thaw out before charging it or jump-starting.

If, at low temperatures, the indicator lamps/warning lamps in the instrument cluster do not light up,

it is highly likely that the discharged battery has frozen. In this case, you may neither charge the

battery nor jump-start the vehicle. The service life of a thawed-out battery may be shorter. The

starting characteristics can be impaired, particularly at low temperatures. Have the thawed-out

battery checked at a qualified specialist workshop.

All vehicles:

!

Avoid repeated and lengthy starting attempts. Otherwise, the catalytic converter could be

damaged by the non-combusted fuel.

376

Jump-starting

Breakdown

assistance

Do not start the vehicle using a rapid charging device. If your vehicle's battery is discharged, the

engine can be jump-started from another vehicle or from a second battery using jumper cables.

Observe the following points:

R

The battery is not accessible in all vehicles. If the other vehicle's battery is not accessible, jump-

start the vehicle using a second battery or a jump-starting device.

R

You may only jump-start the vehicle when the engine and exhaust system are cold.

R

All vehicles except Mercedes-AMG vehicles: do not start the engine if the battery is frozen. Let

the battery thaw first.

R

Only jump-start from batteries with a 12 V voltage rating.

R

Only use jumper cables which have a sufficient cross-section and insulated terminal clamps.

R

If the battery is fully discharged, leave the battery that is being used to jump-start connected for

a few minutes before attempting to start. This charges the battery slightly.

R

Make sure that the two vehicles do not touch.

Make sure that:

R

the jumper cables are not damaged.

R

when the jumper cables are connected to the battery, uninsulated sections of the terminal clamp

do not come into contact with other metal sections.

R

the jumper cables cannot come into contact with parts which can move when the engine is

running, such as the V-belt pulley or the fan.

X

Secure the vehicle by applying the electric parking brake.

X

Shift the transmission to position P.

X

Make sure that the ignition is switched off. All indicator lamps in the instrument cluster must be

off. When using the SmartKey, turn the SmartKey to position 0 in the ignition lock and remove it

(

Y

page 162).

X

Switch off all electrical consumers, e.g. rear window defroster, lighting, etc.

X

Open the hood.

Example: ground point cover

X

Turn fasteners : one Õ turn and remove.

X

Remove the cover while pressing down on cap ; of the washer fluid reservoir.

Jump-starting

377

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Position number D identifies the charged battery of the other vehicle or an equivalent jump-starting

device.

X

Slide cover C of positive terminal = in the direction of the arrow.

X

Connect positive terminal = on your vehicle to positive terminal ? of donor battery D using the

jumper cable. Always begin with positive terminal = on your own vehicle first.

X

Start the engine of the donor vehicle and run it at idling speed.

X

Connect negative terminal A of donor battery D to ground point B of your vehicle using the

jumper cable, connecting the jumper cable to donor battery D first.

X

Start the engine.

X

Before disconnecting the jumper cables, let the engine run for several minutes.

X

First, remove the jumper cables from ground point B and negative terminal A, then from pos-

itive clamp = and positive terminal ?. Begin each time at the contacts on your own vehicle first.

X

After removing the jumper cables, close cover C of positive terminal =.

X

Replace the earth point cover. Make sure all mountings for the fasteners are positioned precisely

beneath the corresponding recesses in the cover.

X

Press fasteners : into the mountings. Turn the fasteners by Õ of a turn to engage.

X

Have the battery checked at a qualified specialist workshop.

PLUG-IN HYBRID vehicles: if your vehicle has been jump-started, it may not be possible to use the

electric drive for approximately 30 minutes.

Jump-starting is not considered to be a normal operating condition.

i

Jumper cables and further information regarding jump-starting can be obtained at any qualified

specialist workshop.

378

Jump-starting

Breakdown

assistance

Towing and tow-starting

Important safety notes

G

WARNING

Functions relevant to safety are restricted or

no longer available if:

R

the engine is not running.

R

the brake system or the power steering is

malfunctioning.

R

there is a malfunction in the voltage supply

or the vehicle's electrical system.

If your vehicle is being towed, much more

force may be necessary to steer or brake.

There is a risk of an accident.
In such cases, use a tow bar. Before towing,

make sure that the steering moves freely.

G

WARNING

When towing or tow-starting another vehicle

and its weight is greater than the permissible

gross weight of your vehicle, the:

R

the towing eye could detach itself

R

the vehicle/trailer combination could roll-

over.

There is a risk of an accident.
When towing or tow-starting another vehicle,

its weight should not be greater than the per-

missible gross weight of your vehicle.

Details on the permissible gross vehicle weight

of your vehicle can be found on the vehicle iden-

tification plate (

Y

page 426).

!

When COLLISION PREVENTION ASSIST

PLUS, DISTRONIC PLUS or the HOLD function

is activated, the vehicle brakes automatically

in certain situations.

To avoid damage to the vehicle, deactivate

these systems in the following or similar sit-

uations:

R

when towing the vehicle

R

in the car wash

!

Make sure that the electric parking brake is

released. If the electric parking brake is faulty,

visit a qualified specialist workshop.

!

Secure the tow rope or tow bar to the towing

eye only. Otherwise, the vehicle could

become damaged.

!

Do not use the towing eyes for recovery pur-

poses as this could damage the vehicle. If in

doubt, recover the vehicle with a crane.

!

When towing, pull away slowly and

smoothly. If the tractive power is too high, the

vehicles could be damaged.

!

Shift the automatic transmission to N and

do not open the driver's or front passenger's

door during towing. The automatic transmis-

sion may otherwise shift to position P, which

could damage the transmission.

!

Do not tow with sling-type equipment. This

could damage the vehicle.

!

The vehicle can be towed a maximum of

30 miles (50km). The towing speed of 30 mph

(50 km/h) must not be exceeded.

If the vehicle has to be towed more than

30 miles (50km), the entire vehicle must be

raised and transported.

It is better to have the vehicle transported than

to have it towed away.

If the vehicle has suffered transmission damage,

have it transported on a transporter or trailer.

The automatic transmission must be in position

N when the vehicle is being towed.
If the automatic transmission cannot be shifted

to position N, have the vehicle transported on a

transporter or trailer.

The battery must be connected and charged.

Otherwise, you:

R

cannot turn the SmartKey to position 2 in the

ignition lock

R

cannot release the electric parking brake

R

cannot shift the automatic transmission to

position N

Disarm the automatic locking feature before the

vehicle is towed (

Y

page 87). You could other-

wise be locked out when pushing or towing the

vehicle.

PLUG-IN HYBRID vehicles:

Towing and tow-starting

379

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PLUG-IN HYBRID vehicles may not be towed

away but must instead be transported, if:

R

the multifunction display is not working or

R

the á

Towing Not Permitted See

Operator's Manual

message appears in the

multifunction display.

If the vehicle is in a dangerous area, it can be

towed out of that area with both axles on the

ground. In this case, the towing distance must

not be greater than 165 ft (50 m) and must not

exceed a towing speed of 6 mph (10 km/h). For

longer distances, have the vehicle loaded and

transported.

Installing/removing the towing eye

Installing the towing eye

The brackets for the screw-in towing eye are

located in the bumpers. They are at the rear and

at the front, under covers :.

X

Remove the towing eye from the vehicle tool

kit/stowage tray (

Y

page 367).

X

Press the mark on cover : inwards in the

direction of the arrow.

X

Remove cover : from the opening.

X

Screw in the towing eye clockwise as far as it

will go and tighten it.

Removing the towing eye

X

Unscrew and remove the towing eye.

X

Attach cover : to the bumper and press until

it engages.

X

Place the towing eye in the vehicle tool kit/

stowage tray.

Towing a vehicle with both axles on

the ground

It is important that you observe the safety

instructions when towing away your vehicle

(

Y

page 379).

The automatic transmission automatically shifts

to position P when you open the driver's or front-

passenger door or when you remove the Smart-

Key from the ignition lock.
In order to ensure that the automatic transmis-

sion stays in position N when towing the vehicle,

you must observe the following points:

X

You must use the SmartKey instead of the

Start/Stop button (

Y

page 162).

X

Make sure that the vehicle is stationary and

that the key is in position 0 in the ignition lock.

X

Turn the SmartKey to position 2 in the ignition

lock.

X

Depress and hold the brake pedal.

X

Shift the automatic transmission to position

N.

X

Release the brake pedal.

X

Release the electric parking brake.

X

Leave the SmartKey in position 2 in the igni-

tion lock.

X

Switch on the hazard warning lamps

(

Y

page 132).

In order to signal a change of direction when

towing the vehicle with the hazard warning

lamps switched on, use the combination switch

as usual. In this case, only the indicator lamps

for the direction of travel flash. After resetting

the combination switch, the hazard warning

lamp starts flashing again.

380

Towing and tow-starting

Br

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assistance

Transporting the vehicle

PLUG-IN HYBRID vehicles

Transportation of the vehicle should only be car-

ried out by professional recovery companies.

4MATIC vehicles/vehicles with auto-

matic transmission

!

When the vehicle is loaded for transport, the

front and rear axles must be stationary and on

the same transportation vehicle. Positioning

over the connection point of the transport

vehicle is not permitted. The drive train may

otherwise be damaged.

All vehicles
!

You may only secure the vehicle by the

wheels, not by parts of the vehicle such as

axle or steering components. Otherwise, the

vehicle could be damaged.

The towing eye can be used to pull the vehicle

onto a trailer or transporter for transporting pur-

poses.

X

Turn the SmartKey to position 2 in the ignition

lock.

X

Shift the automatic transmission to position

N.

As soon as the vehicle has been loaded:

X

Prevent the vehicle from rolling away by

applying the electric parking brake.

X

Shift the automatic transmission to posi-

tion P.

X

Turn the SmartKey to position 0 in the ignition

lock and remove it.

X

Secure the vehicle.

Notes on 4MATIC vehicles

!

Vehicles with 4MATIC must not be towed

with either the front or the rear axle raised, as

doing so will damage the transmission.

Vehicles with 4MATIC may either be towed away

with both axles on the ground or be loaded up

and transported.

If the vehicle's transmission, front, or rear axle is

damaged, have the vehicle transported on a

truck or trailer.

In the event of damage to the electrical sys-

tem: if the battery is defective, the automatic

transmission will be locked in position P. To shift

the automatic transmission to position N, you

must provide power to the vehicle's electrical

system in the same way as when jump-starting

(

Y

page 376).

Have the vehicle transported on a transporter or

trailer.

Tow-starting (emergency engine

starting)

!

Vehicles with automatic transmission must

not be tow-started. You could otherwise dam-

age the automatic transmission.

i

Information on "Jump-starting"

(

Y

page 376).

Fuses

Important safety notes

G

WARNING

If you manipulate or bridge a faulty fuse or if

you replace it with a fuse with a higher amper-

age, the electric cables could be overloaded.

This could result in a fire. There is a risk of an

accident and injury.
Always replace faulty fuses with the specified

new fuses having the correct amperage.

Blown fuses must be replaced with fuses of the

same rating, which you can recognize by the

color and value. The fuse ratings are listed in the

fuse allocation chart.

The fuse allocation chart is on the fuse box in the

trunk (

Y

page 381).

Fuses

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If a newly inserted fuse also blows, have the

cause traced and rectified at a qualified special-

ist workshop, e.g. an authorized Mercedes-Benz

Center.

!

Only use fuses that have been approved for

Mercedes-Benz vehicles and which have the

correct fuse rating for the system concerned.

Otherwise, components or systems could be

damaged.

The fuses in your vehicle serve to close down

faulty circuits. If a fuse blows, all the compo-

nents on the circuit and their functions stop

operating.

Before changing a fuse

X

Switch off the engine.

X

Switch off all electrical consumers.

X

Make sure that the ignition is switched off

(

Y

page 162).

or

X

When using the SmartKey, turn the SmartKey

to position 0 in the ignition lock and remove it

(

Y

page 162).

X

Secure the vehicle against rolling away

(

Y

page 189).

All indicator lamps in the instrument cluster

must be off.

The fuses are located in various fuse boxes:

R

Fuse box on the driver's side of the dashboard

R

Fuse box in the front-passenger footwell

R

Fuse box in the engine compartment on the

left-hand side of the vehicle, when viewed in

the direction of travel

R

Fuse box in the trunk

Dashboard fuse box

!

Do not use a pointed object such as a screw-

driver to open the cover in the dashboard. You

could damage the dashboard or the cover.

!

Make sure that no moisture can enter the

fuse box when the cover is open.

!

When closing the cover, make sure that it is

lying correctly on the fuse box. Moisture seep-

ing in or dirt could otherwise impair the oper-

ation of the fuses.

X

Open the driver's door.

X

To open: pull cover : outwards in the direc-

tion of the arrow and remove it.

X

To close: clip in cover : on the front of the

dashboard.

X

Fold cover : inwards until it engages.

Fuse box in the front-passenger foot-

well

!

Make sure that no moisture can enter the

fuse box when the cover is open.

!

When closing the cover, make sure that it is

lying correctly on the fuse box. Moisture seep-

ing in or dirt could otherwise impair the oper-

ation of the fuses.

X

Open the front-passenger door.

X

Fold cover : down and remove it.

382

Fuses

Breakdown

assistanc

e

Fuse box in the engine compartment

G

WARNING

When the hood is open and the windshield

wipers are set in motion, you can be injured by

the wiper linkage. There is a risk of injury.
Always switch off the windshield wipers and

the ignition before opening the hood.

!

Make sure that no moisture can enter the

fuse box when the cover is open.

!

When closing the cover, make sure that it is

lying correctly on the fuse box. Moisture seep-

ing in or dirt could otherwise impair the oper-

ation of the fuses.

X

Open the hood (

Y

page 352).

X

To open: release retaining clamps : and

remove cover ;.

X

Use a dry cloth to remove any moisture from

the fuse box.

X

Undo screws = on the fuse box.

X

Remove fuse box cover ? forwards.

X

To close: check whether the seal is lying cor-

rectly in cover ?.

X

Insert cover ? at the rear of the fuse box into

the retainer.

X

Fold down cover ? of the fuse box and

tighten screws =.

X

Insert cover ; and secure with retaining

clamps :.

X

Close the hood.

Fuse box in the trunk

!

Make sure that no moisture can enter the

fuse box when the cover is open.

!

When closing the cover, make sure that it is

lying correctly on the fuse box. Moisture seep-

ing in or dirt could otherwise impair the oper-

ation of the fuses.

Fuse box cover (example: Mercedes‑Maybach)

X

Open the trunk lid.

X

Prise open cover : with a flat object at the

top right and top left-hand side.

X

Open cover : downwards in the direction of

the arrow.

i

The fuse allocation chart is located in a

recess at the side of the fuse box. You can find

the corresponding fuse rating and fuse type

on the fuse allocation chart.

Fuses

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Useful information

i

This Operator's Manual describes all models

and all standard and optional equipment of

your vehicle available at the time of publica-

tion of the Operator's Manual. Country-spe-

cific differences are possible. Please note

that your vehicle may not be equipped with all

features described. This also applies to

safety-related systems and functions.

i

Read the information on qualified specialist

workshops (

Y

page 28).

Important safety notes

G

WARNING

If wheels and tires of the wrong size are used,

the wheel brakes or suspension components

may be damaged. There is a risk of an acci-

dent.
Always replace wheels and tires with those

that fulfill the specifications of the original

part.
When replacing wheels, make sure to use the

correct:

R

designation

R

model

When replacing tires, make sure to use the

correct:

R

designation

R

manufacturer

R

model

G

WARNING

A flat tire severely impairs the driving, steer-

ing and braking characteristics of the vehicle.

There is a risk of accident.
Tires without run-flat characteristics:

R

do not drive with a flat tire.

R

immediately replace the flat tire with your

emergency spare wheel or spare wheel, or

consult a qualified specialist workshop.

Tires with run-flat characteristics:

R

pay attention to the information and warn-

ing notices on MOExtended tires (tires with

run-flat characteristics).

Accessories that are not approved for your vehi-

cle by Mercedes-Benz or are not being used cor-

rectly can impair the operating safety.

Before purchasing and using non-approved

accessories, visit a qualified specialist work-

shop and inquire about:

R

suitability

R

legal stipulations

R

factory recommendations

Information on the sizes and types of wheels and

tires for your vehicle can be found under

"Wheel/tire combinations" (

Y

page 410).

Information on tire pressure can be found:

R

on the vehicle's Tire and Loading Information

placard on the B-pillar (

Y

page 394)

R

in the tire pressure table in the fuel filler flap

(

Y

page 189)

R

under "Tire pressure" (

Y

page 387)

Operation

Information on driving

Check the tire pressure when the vehicle is

heavily laden and adjust prior to a trip.

While driving, pay attention to vibrations, noises

and unusual handling characteristics, e.g. pull-

ing to one side. This may indicate that the

wheels or tires are damaged. If you suspect that

a tire is defective, reduce your speed immedi-

ately. Stop the vehicle as soon as possible to

check the wheels and tires for damage. Hidden

tire damage could also be causing the unusual

handling characteristics. If you find no signs of

damage, have the tires and wheels checked at a

qualified specialist workshop.

When parking your vehicle, make sure that the

tires do not get deformed by the curb or other

obstacles. If they cannot be avoided, drive over

obstacles such as curbs slowly and at an obtuse

angle. Otherwise, you may damage the wheels

or tires.

384

Operation

Wheels

and

tir

es

Regular checking of wheels and tires

G

WARNING

Damaged tires can cause tire inflation pres-

sure loss. As a result, you could lose control of

your vehicle. There is a risk of accident.
Check the tires regularly for signs of damage

and replace any damaged tires immediately.

Check wheels and tires for damage at least once

a month. Check wheels and tires after driving

off-road or on rough roads. Damaged wheels

can cause a loss of tire pressure. Pay particular

attention to damage such as:

R

cuts in the tires

R

punctures

R

tears in the tires

R

bulges on tires

R

deformation or severe corrosion on wheels

Regularly check the tire tread depth and the

condition of the tread across the whole width of

the tire (

Y

page 385). If necessary, turn the

front wheels to full lock in order to inspect the

inner side of the tire surface.

All wheels must have a valve cap to protect the

valve against dirt and moisture. Do not mount

anything onto the valve other than the standard

valve cap or other valve caps approved by

Mercedes-Benz for your vehicle. Do not use any

other valve caps or systems, e.g. tire pressure

monitoring systems.

Regularly check the pressure of all the tires par-

ticularly prior to long trips. Adjust the tire pres-

sure as necessary (

Y

page 387).

The service life of tires depends, among other

things, on the following factors:

R

driving style

R

tire pressure

R

distance covered

Notes on tire tread

G

WARNING

Insufficient tire tread will reduce tire traction.

The tire is no longer able to dissipate water.

This means that on wet road surfaces, the risk

of hydroplaning increases, in particular where

speed is not adapted to suit the driving con-

ditions. There is a risk of accident.
If the tire pressure is too high or too low, tires

may exhibit different levels of wear at differ-

ent locations on the tire tread. Thus, you

should regularly check the tread depth and

the condition of the tread across the entire

width of all tires.
Minimum tire tread depth for:

R

Summer tires: â in (3 mm)

R

M+S tires: ã in (4 mm)

For safety reasons, replace the tires before

the legally prescribed limit for the minimum

tire tread depth is reached.

Marking : shows where the bar indicator

(arrow) for tread wear is integrated into the tire

tread.

Treadwear indicators (TWI) are required by law.

Six indicators are positioned on the tire tread.

They are visible once a tread depth of approx-

imately á in (1.6 mm) has been reached. If this

is the case, the tire is so worn that it must be

replaced.

Selecting, mounting and replacing

tires

R

Only mount tires and wheels of the same type

and make.

Exception: it is permissible to install a differ-

ent type or make in the event of a flat tire.

Observe the "MOExtended tires (tires with

run-flat characteristics" section (

Y

page 368).

R

Only mount tires of the correct size onto the

wheels.

Operation

385

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tire

s

Z

R

Break in new tires at moderate speeds for the

first 60 miles (100 km). They only reach their

full performance after this distance.

R

Do not drive with tires which have too little

tread depth, as this significantly reduces the

traction on wet roads (hydroplaning).

R

Replace the tires after six years at the latest,

regardless of wear.

MOExtended tires (tires with run-flat

properties)

With MOExtended tires (tires with run flat char-

acteristics), you can continue to drive your vehi-

cle even if there is a total loss of pressure in one

or more tires.

MOExtended tires may only be used in conjunc-

tion with an active tire pressure loss warning

system or with an active tire pressure monitor

and on wheels specifically tested by Mercedes-

Benz.

Notes on driving with MOExtended tires with a

flat tire (

Y

page 368).

Vehicles equipped with MOExtended tires are

not equipped with a TIREFIT kit at the factory. It

is therefore recommended that you additionally

equip your vehicle with a TIREFIT kit if you mount

tires that do not feature run-flat properties, e.g.

winter tires. A TIREFIT kit can be obtained from

a qualified specialist workshop.

Winter operation

General notes

Have your vehicle winterproofed at a qualified

specialist workshop at the onset of winter.

Observe the notes in the "Changing a wheel"

section (

Y

page 405).

Driving with summer tires

At temperatures below 45 ‡ (+7 †), summer

tires lose elasticity and therefore traction and

braking power. Change the tires on your vehicle

to M+S tires. Using summer tires at very cold

temperatures could cause cracks to form,

thereby damaging the tires permanently.

Mercedes-Benz cannot accept responsibility for

this type of damage.

G

WARNING

Damaged tires can cause tire inflation pres-

sure loss. As a result, you could lose control of

your vehicle. There is a risk of accident.
Check the tires regularly for signs of damage

and replace any damaged tires immediately.

M+S tires

G

WARNING

M+S tires with a tire tread depth of less than

ã in (4 mm) are not suitable for use in winter

and do not provide sufficient traction. There is

a risk of an accident.
M+S tires with a tread depth of less than ã in

(4 mm) must be replaced immediately.

At temperatures below 45 ‡ (+7 †), use winter

tires or all-season tires. Both types of tire are

identified by the M+S marking.

Only winter tires bearing the i snowflake

symbol in addition to the M+S marking provide

the best possible grip in wintry road conditions.

Only these tires will allow driving safety systems

such as ABS and ESP

®

to function optimally in

winter. These tires have been developed specif-

ically for driving in snow.

Use M+S tires of the same make and tread on all

wheels to maintain safe handling characteris-

tics.

Always observe the maximum permissible

speed specified for the M+S tires you have

mounted.
When you have mounted M+S tires:

X

Check the tire pressures (

Y

page 390).

X

Restart the tire pressure monitor

(

Y

page 392).

Snow chains

G

WARNING

If snow chains are installed to the front

wheels, they may drag against the vehicle

body or chassis components. This could

cause damage to the vehicle or the tires.

There is a risk of an accident.

386

Winter operation

Whe

els

and

tire

s

To avoid hazardous situations:

R

never install snow chains to the front

wheels

R

always install snow chains in pairs to the

rear wheels.

For safety reasons, Mercedes-Benz recom-

mends that you only use snow chains that have

been specially approved for your vehicle by

Mercedes-Benz, or are of a corresponding

standard of quality.

If you intend to mount snow chains, please bear

the following points in mind:

R

Snow chains may not be mounted on all

wheel/tire combinations. Permissible wheel-

tire combinations (

Y

page 410).

R

Only use snow chains when driving on roads

completely covered by snow. Remove the

snow chains as soon as possible when you

come to a road that is not snow-covered.

R

Local regulations may restrict the use of snow

chains. Observe the appropriate regulations if

you wish to mount snow chains.

R

Do not exceed the maximum permissible

speed of 31 mph (50 km/h).

R

On vehicles with AIRMATIC (

Y

page 212) or

Magic Body Control (MBC) (

Y

page 210), you

must drive at raised vehicle level if snow

chains have been mounted.

R

When snow chains are installed, never use

Active Parking Assist (

Y

page 216).

You may wish to deactivate ESP

®

when pulling

away with snow chains installed (

Y

page 74).

You can thereby allow the wheels to spin in a

controlled manner, achieving an increased driv-

ing force (cutting action).

Tire pressure

Tire pressure specifications

Important safety notes

G

WARNING

Underinflated or overinflated tires pose the

following risks:

R

the tires may burst, especially as the load

and vehicle speed increase.

R

the tires may wear excessively and/or

unevenly, which may greatly impair tire

traction.

R

the driving characteristics, as well as steer-

ing and braking, may be greatly impaired.

There is a risk of an accident.
Follow recommended tire inflation pressures

and check the pressure of all the tires includ-

ing the spare wheel:

R

monthly, at least

R

if the load changes

R

before beginning a long journey

R

under different operating conditions, e.g.

off-road driving

If necessary, correct the tire pressure.

The data on the Tire and Loading Information

placard and tire pressure table shown here are

examples. Tire pressure specifications are vehi-

cle-specific and may deviate from the data

shown here. The tire pressure specifications

that are valid for your vehicle can be found on

the Tire and Loading Information placard and

tire pressure table on the vehicle.

General notes

The recommended tire pressures for the tires

mounted at the factory can be found on the

labels described here.

Further information on tire pressures can be

obtained at a qualified specialist workshop.

Tire pressure

387

Wheels

and

tires

Z

Tire and Loading Information placard

:

Recommended tire pressures

The Tire and Loading Information placard is on

the B-pillar on the driver's side (

Y

page 394).

The Tire and Loading Information placard con-

tains the recommended tire pressures for cold

tires. The recommended tire pressures are valid

for the maximum permissible load and up to the

maximum permissible vehicle speed.

Tire pressure table

The tire pressure table is on the inside of the fuel

filler flap. It shows the tire pressure for all tires

permitted at the factory for this vehicle; see

illustration (example).

The tire pressure table contains the recommen-

ded pressures for cold tires for various operat-

ing conditions, i.e. differing load and speed con-

ditions.

If a tire size precedes a tire pressure, the fol-

lowing tire pressure information is only valid for

that tire size; see illustration (example).

The load conditions "partially laden" and "fully

laden" are defined in the table for different num-

bers of occupants and amounts of luggage. The

actual number of seats may differ.

Some tire pressure tables show only the rim

diameters instead of the full tire size, e.g. R18.

Rim diameter is part of the tire size and can be

found on the tire sidewall (

Y

page 400).

If the tire pressures have been set to the lower

values for lighter loads and/or lower road

speeds, the pressures should be reset to the

higher values:

R

if you want to drive with an increased load

and/or

R

if you want to drive at higher road speeds

The tire pressures for increased loads and/or

higher road speeds, shown in the tire pressure

table, may have a negative effect on driving

comfort.

If the tire pressure is not set correctly, this can

lead to an excessive build up of heat and a sud-

den loss of pressure.

For more information, contact a qualified spe-

cialist workshop.

388

Tire pressure

Whee

ls

an

d

tires

Important notes on tire pressure

G

WARNING

If the tire pressure drops repeatedly, the

wheel, valve or tire may be damaged. Tire

pressure that is too low may result in a tire

blow-out. There is a risk of an accident.

R

Check the tire for foreign objects.

R

Check whether the wheel is losing air or the

valve is leaking.

If you are unable to rectify the damage, con-

tact a qualified specialist workshop.

G

WARNING

If you fit unsuitable accessories onto tire

valves, the tire valves may be overloaded and

malfunction, which can cause tire pressure

loss. Due to their design, retrofitted tire pres-

sure monitors keep the tire valve open. This

can also result in tire pressure loss. There is a

risk of an accident.
Only screw the standard valve cap or other

valve caps approved by Mercedes-Benz for

your vehicle onto the tire valve.

Use a suitable pressure gauge to check the tire

pressure. The outer appearance of a tire does

not permit any reliable conclusion about the tire

pressure. On vehicles equipped with the elec-

tronic tire pressure monitor, the tire pressure

can be checked in the on-board computer.

The tire temperature and pressure increase

when the vehicle is in motion. This is dependent

on the driving speed and the load.

Therefore, you should only correct tire pres-

sures when the tires are cold.

The tires are cold:

R

if the vehicle has been parked with the tires

out of direct sunlight for at least three hours

and

R

if the vehicle has not been driven further than

1 mile (1.6 km)

The tire temperature changes depending on the

outside temperature, the vehicle speed and the

tire load. If the tire temperature changes by

18 ‡ (10 †), the tire pressure changes by

approximately 10 kPa (0.1 bar/1.5 psi). Take

this into account when checking the pressure of

warm tires. Only correct the tire pressure if it is

too low for the current operating conditions. If

you check the tire pressure when the tires are

warm, the resulting value will be higher than if

the tires were cold. This is normal. Do not

reduce the tire pressure to the value specified

for cold tires. The tire pressure would otherwise

be too low.

Observe the recommended tire pressures for

cold tires:

R

on the Tire and Loading Information placard

on the B-pillar on the driver's side

R

in the tire pressure table on the fuel filler flap

(

Y

page 189)

Underinflated or overinflated tires

Underinflated tires

G

WARNING

Tires with pressure that is too low can over-

heat and burst as a consequence. In addition,

they also suffer from excessive and/or irreg-

ular wear, which can severely impair the brak-

ing properties and the driving characteristics.

There is a risk of an accident.
Avoid tire pressures that are too low in all the

tires, including the spare wheel.

Underinflated tires may:

R

overheat, leading to tire defects

R

adversely affect handling

R

wear excessively and/or unevenly

R

have an adverse effect on fuel consumption

Overinflated tires

G

WARNING

Tires with excessively high pressure can burst

because they are damaged more easily by

road debris, potholes etc. In addition, they

also suffer from irregular wear, which can

severely impair the braking properties and the

driving characteristics. There is a risk of an

accident.
Avoid tire pressures that are too high in all the

tires, including the spare wheel.

Tire pressure

389

Wheels

and

tires

Z

Overinflated tires may:

R

increase the braking distance

R

adversely affect handling

R

wear excessively and/or unevenly

R

have an adverse effect on ride comfort

R

be more susceptible to damage

Maximum tire pressures

:

Example: maximum permissible tire pres-

sure

Never exceed the maximum permissible tire

inflation pressure. Always observe the recom-

mended tire pressure for your vehicle when

adjusting the tire pressure (

Y

page 387).

i

The actual values for tires are vehicle-spe-

cific and may deviate from the values in the

illustration.

Checking the tire pressures

Important safety notes

Observe the notes on tire pressure

(

Y

page 387).

Information on air pressure for the tires on your

vehicle can be found:

R

on the vehicle's Tire and Loading Information

placard on the B-pillar (

Y

page 394)

R

in the tire pressure table in the fuel filler flap

(

Y

page 189)

R

in the "Tire pressure" section

Checking tire pressures manually

To determine and set the correct tire pressure,

proceed as follows:

X

Remove the valve cap of the tire that is to be

checked.

X

Press the tire pressure gage securely onto the

valve.

X

Read the tire pressure and compare it to the

recommended value on the Tire and Loading

Information placard or the tire pressure table

(

Y

page 387).

X

If the tire pressure is too low, increase the tire

pressure to the recommended value.

X

If the tire pressure is too high, release air. To

do so, press down the metal pin in the valve,

using the tip of a pen for example. Then check

the tire pressure again using the tire pressure

checker.

X

Screw the valve cap onto the valve.

X

Repeat these steps for the other tires.

Tire pressure monitor

General notes

If a tire pressure monitor is installed, the vehi-

cle's wheels have sensors that monitor the tire

pressures in all four tires. The tire pressure mon-

itor warns you if the pressure drops in one or

more of the tires. The tire pressure monitor only

functions if the corresponding sensors are

installed in all wheels.

Information on tire pressures is displayed in the

multifunction display. After a few minutes of

driving, the current tire pressure of each tire is

shown in the

Service

menu of the multifunction

display; see illustration (example).

For information on the message display, refer to

the "Checking the tire pressure electronically"

section (

Y

page 392).

390

Tire pressure

Wheels

and

tires

Important safety notes

G

WARNING

Each tire, including the spare (if provided),

should be checked at least once every two

weeks when cold and inflated to the pressure

recommended by the vehicle manufacturer

on the Tire and Loading Information placard

on the driver's door B-pillar or the tire pres-

sure label on the inside of the fuel filler flap. If

your vehicle has tires of a different size than

the size indicated on the Tire and Loading

Information placard or, if available, the tire

pressure label, you should determine the

proper tire pressure for those tires.
As an added safety feature, your vehicle has

been equipped with a tire pressure monitoring

system (TPMS) that illuminates a low tire pres-

sure telltale when one or more of your tires

are significantly underinflated. Accordingly,

when the low tire pressure telltale lights up,

you should stop and check your tires as soon

as possible, and inflate them to the proper

pressure. Driving on a significantly underin-

flated tire causes the tire to overheat and can

lead to tire failure.
Underinflation also reduces fuel efficiency

and tire tread life, and may affect the vehicle's

handling and stopping ability. Please note that

the TPMS is not a substitute for proper tire

maintenance, and it is the driver's responsi-

bility to maintain correct tire pressure, even if

underinflation has not reached the level to

trigger illumination of the TPMS low tire pres-

sure telltale.
Your vehicle has also been equipped with a

TPMS malfunction indicator to indicate when

the system is not operating properly. The

TPMS malfunction indicator is combined with

the low tire pressure telltale. When the sys-

tem detects a malfunction, the warning lamp

will flash for approximately a minute and then

remain continuously illuminated. This

sequence will be repeated every time the vehi-

cle is started as long as the malfunction

exists. When the malfunction indicator is illu-

minated, the system may not be able to detect

or signal low tire pressure as intended.
TPMS malfunctions may occur for a variety of

reasons, including the installation of incom-

patible replacement or alternate tires or

wheels on the vehicle that prevent the TPMS

from functioning properly. Always check the

TPMS malfunction telltale after replacing one

or more tires or wheels on your vehicle to

ensure that the replacement or alternate Tires

and wheels allow the TPMS to continue to

function properly.

It is the driver's responsibility to set the tire

pressure to that recommended for cold tires

which is suitable for the operating situation

(

Y

page 387). Note that the correct tire pressure

for the current operating situation must first be

taught-in to the tire pressure monitor. If there is

a substantial loss of pressure, the warning

threshold for the warning message is aligned to

the reference values taught-in. Restart the tire

pressure monitor after adjusting the pressure of

the cold tires (

Y

page 392). The current pres-

sures are saved as new reference values. As a

result, a warning message will appear if the tire

pressure drops significantly.

The tire pressure monitor does not warn you of

an incorrectly set tire pressure. Observe the

notes on the recommended tire pressure

(

Y

page 387).

The tire pressure monitor is not able to warn you

of a sudden loss of pressure, e.g. if the tire is

penetrated by a foreign object. In the event of a

sudden loss of pressure, bring the vehicle to a

halt by braking carefully. Avoid abrupt steering

movements.

The tire pressure monitor has a yellow warning

lamp in the instrument cluster for indicating

pressure loss or a malfunction. Whether the

warning lamp flashes or lights up indicates

whether a tire pressure is too low or the tire

pressure monitor is malfunctioning:

R

if the warning lamp is lit continuously, the tire

pressure on one or more tires is significantly

too low. The tire pressure monitor is not mal-

functioning.

R

if the warning lamp flashes for around a

minute and then remains lit constantly, the

tire pressure monitor is malfunctioning.

In addition to the warning lamp, a message

appears in the multifunction display. Observe

Tire pressure

391

Wheels

and

tires

Z