Mersedes Maybach S-Class. Service Manual — part 4
G
WARNING
The distance warning function cannot always
clearly identify objects and complex traffic
situations.
In such cases, the distance warning function
may:
R
give an unnecessary warning
R
not give a warning
There is a risk of an accident.
Always pay careful attention to the traffic sit-
uation and do not rely solely on the distance
warning function.
X
Brake immediately in order to increase the
distance from the vehicle in front.
or
X
Take evasive action, provided it is safe to do
so.
Due to the nature of the system, particularly
complicated but non-critical driving conditions
may also cause the system to display a warning.
Autonomous braking function
If the driver does not react to the distance warn-
ing signal in a critical situation, COLLISION PRE-
VENTION ASSIST PLUS can assist with the
autonomous braking function.
The autonomous braking function:
R
gives the driver more time to react to critical
driving situations
R
can help the driver to avoid an accident or
R
reduces the effects of an accident
The autonomous braking function is available in
the following speed ranges:
R
from 4 mph (7 km/h) to approx. 65 mph
(105 km/h) for moving objects
R
from 4 mph (7 km/h) to approx. 31 mph
(50 km/h) for stationary objects
Due to the nature of the system, particularly
complicated but non-critical driving conditions
may also cause the Autonomous Braking Func-
tion to intervene.
If the autonomous braking function requires a
particularly high braking force, preventative
passenger protection measures (PRE-SAFE
®
)
are activated simultaneously (
Y
page 59).
Adaptive Brake Assist
General information
i
Observe the "Important safety notes" sec-
tion (
Y
page 68).
With the help of adaptive Brake Assist, the dis-
tance warning signal can detect obstacles that
are in the path of your vehicle for an extended
period of time.
If adaptive Brake Assist detects a risk of colli-
sion with the vehicle in front, it calculates the
braking force necessary to avoid a collision. If
you apply the brakes forcefully, adaptive Brake
Assist will automatically increase the braking
force to a level suitable for the traffic conditions.
Adaptive Brake Assist provides braking assis-
tance in hazardous situations at speeds above
4 mph (7 km/h). It uses radar sensor technology
to assess the traffic situation.
Up to a speed of approximately 155 mph
(250 km/h), Adaptive Brake Assist is capable of
reacting to moving objects that have already
been detected as such at least once over the
period of observation.
Up to a speed of approximately 44 mph
(70 km/h), Adaptive Brake Assist reacts to sta-
tionary obstacles.
If adaptive Brake Assist demands particularly
high braking force, preventative passenger pro-
tection measures (PRE-SAFE
®
) are activated
simultaneously (
Y
page 59).
X
Keep the brake pedal depressed until the
emergency braking situation is over.
ABS prevents the wheels from locking.
The brakes will work normally again if:
R
you release the brake pedal.
R
there is no longer any danger of a collision.
R
no obstacle is detected in front of your vehi-
cle.
Adaptive Brake Assist is then deactivated.
Important safety notes
G
WARNING
Adaptive Brake Assist cannot always clearly
identify objects and complex traffic situa-
tions.
In such cases, Adaptive Brake Assist can:
R
intervene unnecessarily
R
not intervene
72
Driving safety systems
Safety
-------------------------------------------------------------------------------------------------------------------------------------------------------------
There is a risk of an accident.
Always pay careful attention to the traffic sit-
uation and be ready to brake. Terminate the
intervention in a non-critical driving situation.
G
WARNING
Adaptive Brake Assist does not react:
R
to people or animals
R
to oncoming vehicles
R
to crossing traffic
R
when cornering
As a result, the Adaptive Brake Assist may not
intervene in all critical conditions. There is a
risk of an accident.
Always pay careful attention to the traffic sit-
uation and be ready to brake.
Due to the nature of the system, particularly
complicated but non-critical driving conditions
may also cause Adaptive Brake Assist to inter-
vene.
If adaptive Brake Assist is not available due to a
malfunction in the radar sensor system, the
brake system remains available with full brake
boosting effect and BAS.
ESP
®
(Electronic Stability Program)
General notes
i
Observe the "Important safety notes" sec-
tion (
Y
page 68).
ESP
®
monitors driving stability and traction, i.e.
power transmission between the tires and the
road surface.
If ESP
®
detects that the vehicle is deviating from
the direction desired by the driver, one or more
wheels are braked to stabilize the vehicle. The
engine output is also modified to keep the vehi-
cle on the desired course within physical limits.
ESP
®
assists the driver when pulling away on
wet or slippery roads. ESP
®
can also stabilize
the vehicle during braking.
ETS/4ETS (Electronic Traction System)
i
Observe the "Important safety notes" sec-
tion (
Y
page 68).
ETS traction control is part of ESP
®
. On vehicles
with 4MATIC, 4ETS is part of ESP
®
.
Traction control brakes the drive wheels indi-
vidually if they spin. This enables you to pull
away and accelerate on slippery surfaces, for
example if the road surface is slippery on one
side. In addition, more drive torque is transfer-
red to the wheel or wheels with traction.
Traction control remains active, even if you
deactivate ESP
®
.
Important safety notes
G
WARNING
If ESP
®
is malfunctioning, ESP
®
is unable to
stabilize the vehicle. Additionally, further driv-
ing safety systems are deactivated. This
increases the risk of skidding and an accident.
Drive on carefully. Have ESP
®
checked at a
qualified specialist workshop.
If the å ESP
®
OFF warning lamp lights up
continuously, then ESP
®
is deactivated.
If the ÷ ESP
®
warning lamp lights up contin-
uously, ESP
®
is not available due to a malfunc-
tion.
Observe the information on warning lamps
(
Y
page 317) and display messages which may
be shown in the instrument cluster
(
Y
page 278).
Only use wheels with the recommended tire
sizes. Only then will ESP
®
function properly.
Characteristics of ESP
®
General information
If the ÷ ESP warning lamp goes out before
beginning the journey, ESP
®
is automatically
active.
If ESP
®
intervenes, the ÷ ESP
®
warning lamp
flashes in the instrument cluster.
Driving safety systems
73
Safety
Z
-------------------------------------------------------------------------------------------------------------------------------------------------------------
If ESP
®
intervenes:
X
Do not deactivate ESP
®
under any circum-
stances.
X
Only depress the accelerator pedal as far as
necessary when pulling away.
X
Adapt your driving style to suit the prevailing
road and weather conditions.
ECO start/stop function
The ECO start/stop function is not available for
PLUG-IN HYBRID vehicles.
The ECO start/stop function switches the
engine off automatically when the vehicle stops
moving. The engine starts automatically when
the driver wants to pull away again. ESP
®
remains in its previously selected status. Exam-
ple: if ESP
®
was deactivated before the engine
was switched off, ESP
®
remains deactivated
when the engine is switched on again.
Deactivating/activating ESP
®
Important safety notes
i
Observe the "Important safety notes" sec-
tion (
Y
page 68).
You can select between the following states of
ESP
®
:
R
ESP
®
is activated.
R
ESP
®
is deactivated.
G
WARNING
If you deactivate ESP
®
, ESP
®
no longer sta-
bilizes the vehicle. There is an increased risk
of skidding and an accident.
Only deactivate ESP
®
in the situations descri-
bed in the following.
It may be best to deactivate ESP
®
in the follow-
ing situations:
R
when using snow chains
R
in deep snow
R
on sand or gravel
i
Activate ESP
®
as soon as the situations
described above no longer apply. ESP
®
will
otherwise not be able to stabilize the vehicle if
the vehicle starts to skid or a wheel starts to
spin.
!
Avoid spinning the driven wheels for an
extended period with ESP
®
deactivated. You
could otherwise damage the drivetrain.
Deactivating/activating ESP
®
You can deactivate or activate ESP
®
via the on-
board computer (
Y
page 269).
ESP
®
deactivated:
The å ESP
®
OFF warning lamp in the instru-
ment cluster lights up.
ESP
®
activated:
The å ESP
®
OFF warning lamp in the instru-
ment cluster goes out.
Characteristics when ESP
®
is deactivated
If ESP
®
is deactivated and one or more wheels
start to spin, the ÷ ESP
®
warning lamp in the
instrument cluster flashes. In such situations,
ESP
®
will not stabilize the vehicle.
If you deactivate ESP
®
:
R
ESP
®
no longer improves driving stability.
R
Engine torque is no longer limited and the
drive wheels are able to spin.
The spinning of the wheels results in a cutting
action for better traction on loose surfaces.
R
Traction control is still activated.
R
COLLISION PREVENTION ASSIST is no longer
available; nor is it activated if you brake firmly
with assistance from ESP
®
.
R
PRE-SAFE
®
is no longer available, nor is it
activated if you brake firmly and ESP
®
inter-
venes.
R
PRE-SAFE
®
Brake is no longer available, it is
also not activated if you brake firmly and ESP
®
intervenes.
R
ESP
®
still provides support when you brake
firmly.
ESP
®
trailer stabilization
General information
ESP
®
trailer stabilization is not available in
Mercedes-AMG vehicles.
If your vehicle/trailer combination begins to
swerve, ESP
®
assists you in this situation. ESP
®
slows the vehicle down by braking and limiting
the engine output until the vehicle/trailer com-
bination has stabilized.
74
Driving safety systems
Safety
-------------------------------------------------------------------------------------------------------------------------------------------------------------
Important safety notes
G
WARNING
If road and weather conditions are poor,
trailer stabilization will not be able to prevent
the vehicle/trailer combination from swerv-
ing. Trailers with a high center of gravity can
tip over before ESP
®
can detect this. There is
a risk of an accident.
Always adapt your driving style to the prevail-
ing road and weather conditions.
If your vehicle with trailer (vehicle/trailer com-
bination) begins to lurch, you can only stabilize
the vehicle/trailer combination by depressing
the brake firmly.
ESP
®
trailer stabilization is active above speeds
of about 65 km/h.
ESP
®
trailer stabilization does not work if ESP
®
is deactivated or disabled because of a malfunc-
tion.
Crosswind Assist (vehicles without
MAGIC BODY CONTROL)
General information
Vehicles with MAGIC BODY CONTROL: informa-
tion on stabilizing the vehicle in the event of
crosswind (
Y
page 210).
Strong crosswinds can cause your vehicle to
deviate from a straight course. The crosswind
driving assistance function integrated in ESP
®
noticeably reduces these impairments.
ESP
®
intervenes automatically according to the
direction and intensity of the crosswinds affect-
ing your vehicle.
ESP intervenes with stabilizing braking to assist
you in keeping the vehicle in the lane.
Crosswind Assist is active at vehicle speeds
above 50 mph (80 km/h) when driving straight
ahead or cornering gently.
Important safety notes
Crosswind Assist does not work if ESP
®
is
switched off or deactivated because of a mal-
function.
EBD (electronic brake force distribu-
tion)
General information
EBD monitors and controls the brake pressure
on the rear wheels to improve driving stability
while braking.
Important safety notes
i
Observe the "Important safety notes" sec-
tion (
Y
page 68).
G
WARNING
If EBD is malfunctioning, the rear wheels can
lock, e.g. under full braking. This increases the
risk of skidding and an accident.
You should therefore adapt your driving style
to the different handling characteristics. Have
the brake system checked at a qualified spe-
cialist workshop.
Observe information regarding indicator and
warning lamps (
Y
page 316) as well as display
messages (
Y
page 280).
ADAPTIVE BRAKE
ADAPTIVE BRAKE enhances braking safety and
offers increased braking comfort. In addition to
the braking function, ADAPTIVE BRAKE also has
the HOLD function (
Y
page 208) and hill start
assist (
Y
page 165).
PRE-SAFE
®
Brake
General information
PRE-SAFE
®
Brake can help you to minimize the
risk of a collision with a vehicle ahead or a
pedestrian, and reduce the effects of such a
collision. If PRE-SAFE
®
Brake has detected a risk
of collision, you will be warned visually and
acoustically as well as by automatic braking.
i
Pay attention to the important safety notes
in the "Driving safety systems" section
(
Y
page 68).
PRE‑SAFE
®
Brake is only available in vehicles
with the Driving Assistance Plus package.
Driving safety systems
75
Safety
Z
-------------------------------------------------------------------------------------------------------------------------------------------------------------
For PRE-SAFE
®
Brake to assist you when driving,
the radar sensor system and the camera system
must be switched on and be operational.
With the help of the radar sensor system and the
camera system, PRE-SAFE
®
Brake can detect
obstacles that are in front of your vehicle for an
extended period of time.
In addition, pedestrians in the path of your vehi-
cle can be detected.
PRE-SAFE
®
Brake detects pedestrians using
typical characteristics such as the body con-
tours and posture of a person standing upright.
i
Observe the restrictions described in the
"Important safety notes" sec-
tion“ (
Y
page 76).
Important safety notes
G
WARNING
PRE-SAFE
®
Brake will initially brake your vehi-
cle by a partial application of the brakes if a
danger of collision is detected. There may be
a collision unless you brake yourself. Even
after subsequent full application of the brakes
a collision cannot always be avoided, partic-
ularly when approaching at too high a speed.
There is a risk of an accident.
Always apply the brakes yourself and try to
take evasive action, provided it is safe to do
so.
In the event of a partial application of the brakes,
the vehicle is braked with up to 50% of the full
braking pressure.
G
WARNING
PRE-SAFE
®
Brake cannot always clearly iden-
tify objects and complex traffic conditions.
In these cases, PRE-SAFE
®
Brake may:
R
give an unnecessary warning and then
brake the vehicle
R
not give a warning or intervene
There is a risk of an accident.
Always pay particular attention to the traffic
situation and be ready to brake, especially if
PRE-SAFE
®
Brake warns you. Terminate the
intervention in a non-critical driving situation.
G
WARNING
PRE-SAFE
®
Brake cannot always clearly iden-
tify people, especially if they are moving. In
these cases, PRE-SAFE
®
Brake cannot inter-
vene. There is a risk of an accident.
Always pay particular attention to the traffic
situation and be ready to brake, especially if
PRE-SAFE
®
Brake warns you.
In order to maintain the appropriate distance to
the vehicle in front and thus prevent a collision,
you must apply the brakes yourself.
G
WARNING
PRE-SAFE
®
Brake does not react:
R
to small people, e.g. children
R
to animals
R
to oncoming vehicles
R
to crossing traffic
R
when cornering
As a result, PRE-SAFE
®
Brake may neither
give warnings nor intervene in all critical sit-
uations. There is a risk of an accident.
Always pay careful attention to the traffic sit-
uation and be ready to brake.
In the event of snowfall or heavy rain, the rec-
ognition can be impaired.
Recognition by the radar sensor system is also
impaired in the event of:
R
there is dirt on the sensors or anything else
covering the sensors
R
there is interference by other radar sources
R
there are strong radar reflections, for exam-
ple in parking garages
R
a narrow vehicle traveling in front, e.g. a
motorbike
R
a vehicle traveling in front on a different line
relative to the center of your vehicle
Recognition by the camera system is also
impaired in the event of:
R
dirt on the camera or if the camera is covered
R
there is glare on the camera system, e.g. from
the sun being low in the sky
76
Driving safety systems
Safety
-------------------------------------------------------------------------------------------------------------------------------------------------------------
R
darkness
R
if:
-
pedestrians move quickly, e.g. into the path
of the vehicle
-
the camera system no longer recognizes a
pedestrian as a person due to special cloth-
ing or other objects
-
a pedestrian is concealed by other objects
-
the typical outline of a person is not distin-
guishable from the background
Following damage to the front end of the vehicle,
have the configuration and operation of the
radar sensors checked at a qualified specialist
workshop. This also applies to collisions at slow
speeds where there is no visible damage to the
front of the vehicle.
Following damage to the windshield, have the
configuration and operation of the camera sys-
tem checked at a qualified specialist workshop.
Function
X
To activate/deactivate: activate or deacti-
vate PRE-SAFE
®
Brake in the on-board com-
puter (
Y
page 271).
If the PRE-SAFE
®
Brake is not activated, the
æ symbol appears in the multifunction dis-
play.
Starting at a speed of around 4 mph (7 km/h),
this function warns you if you rapidly approach a
vehicle in front. An intermittent warning tone
will then sound and the · distance warning
lamp will light up in the instrument cluster.
X
Brake immediately to defuse the situation.
or
X
Take evasive action provided it is safe to do
so.
PRE-SAFE
®
Brake can also brake the vehicle
automatically under the following conditions:
R
the driver and front-passenger have their seat
belts fastened
and
R
the vehicle speed is between approximately
4 mph (7 km/h) and 124 mph (200 km/h)
At speeds of up to approximately 44 mph
(70 km/h) PRE-SAFE
®
Brake can also detect:
R
stationary objects in the path of your vehicle,
e.g. stopped or parked vehicles
R
pedestrians in the path of your vehicle
i
If there is an increased risk of a collision,
preventive passenger protection measures
(PRE-SAFE
®
) are triggered (
Y
page 59).
If the risk of collision with the vehicle in front
remains and you do not brake, take evasive
action or accelerate significantly, the vehicle
may perform automatic emergency braking, up
to the point of full brake application. Automatic
emergency braking is not performed until imme-
diately prior to an imminent accident.
You can prevent the intervention of the PRE-
SAFE
®
Brake at any time by:
R
depressing the accelerator pedal further.
R
activating kickdown.
R
releasing the brake pedal.
The braking action of PRE-SAFE
®
Brake is ended
automatically if:
R
you maneuver to avoid the obstacle.
R
there is no longer a risk of collision.
R
there is no longer an obstacle detected in
front of your vehicle.
STEER CONTROL
General information
STEER CONTROL helps you by transmitting a
noticeable steering force to the steering wheel
in the direction required for vehicle stabilization.
This steering assistance is provided in particular
if:
R
both right wheels or both left wheels are on a
wet or slippery road surface when you brake.
R
the vehicle starts to skid.
Important safety notes
i
Observe the "Important safety notes" sec-
tion (
Y
page 68).
No steering support is provided from STEER
CONTROL, if:
R
ESP
®
is deactivated
R
ESP
®
is malfunctioning.
R
the lighting is faulty.
Power steering will, however, continue to func-
tion.
Driving safety systems
77
Safety
Z
-------------------------------------------------------------------------------------------------------------------------------------------------------------
Protection against theft
Immobilizer
The immobilizer prevents your vehicle from
being started without the correct SmartKey.
X
To activate with the SmartKey: remove the
SmartKey from the ignition lock.
X
To activate with KEYLESS-GO: switch the
ignition off and open the driver's door.
X
To deactivate: switch on the ignition.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Anyone
can start the engine if a valid SmartKey has been
left inside the vehicle.
i
The immobilizer is always deactivated when
you start the engine.
In the event that the engine cannot be started
(yet the vehicle's battery is charged), the sys-
tem is not operational. Contact an authorized
Mercedes-Benz Center or call
1-800-FOR-MERCedes (in the USA) or
1-800-387-0100 (in Canada).
ATA (anti-theft alarm system)
X
To arm: lock the vehicle with the SmartKey or
KEYLESS-GO.
Indicator lamp : flashes. The alarm system
is armed after approximately 10 seconds.
X
To disarm: unlock the vehicle with the Smart-
Key or KEYLESS-GO.
or
X
Insert the SmartKey into the ignition lock.
A visual and audible alarm is triggered if the
alarm system is armed and you open:
R
a door
R
the vehicle with the mechanical key
R
the trunk lid
R
the hood
X
To turn the alarm off with the SmartKey:
press the % or & button on the Smart-
Key.
The alarm is switched off.
or
X
Remove the Start/Stop button from the igni-
tion lock.
X
Insert the SmartKey into the ignition lock.
The alarm is switched off.
X
To stop the alarm using KEYLESS-GO:
grasp the outside door handle. The SmartKey
must be outside the vehicle.
The alarm is switched off.
or
X
Press the Start/Stop button on the dash-
board. The SmartKey must be inside the vehi-
cle.
The alarm is switched off.
The alarm is not switched off, even if you close
the open door that triggered it, for example.
i
If the alarm continues for more than
30 seconds, the mbrace emergency call sys-
tem automatically notifies the Customer
Assistance Center. This is done either by text
message or data connection.
The emergency call system sends a message
or establishes a data connection provided
that:
R
you have subscribed to the mbrace service.
R
the mbrace service has been activated
properly.
R
the necessary mobile phone network is
available.
78
Protection against theft
Safety
-------------------------------------------------------------------------------------------------------------------------------------------------------------
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).
SmartKey
Important safety notes
G
WARNING
If children are left unsupervised in the vehicle,
they could:
R
open the doors, thus endangering other
people or road users.
R
get out and disrupt traffic.
R
operate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
R
release the parking brake.
R
shifting the automatic transmission out of
park position P
R
Start the engine.
There is a risk of an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children.
G
WARNING
If you attach heavy or large objects to the
SmartKey, the SmartKey could be uninten-
tionally turned in the ignition lock. This could
cause the engine to be switched off. There is a
risk of an accident.
Do not attach any heavy or large objects to the
SmartKey. Remove any bulky key rings before
inserting the SmartKey into the ignition lock.
!
Keep the SmartKey away from strong mag-
netic fields. Otherwise, the remote control
function could be affected.
Strong magnetic fields can occur in the vicin-
ity of powerful electrical installations.
Do not keep the SmartKey:
R
with electronic devices, e.g. a mobile phone
or another SmartKey.
R
with metallic objects, e.g. coins or metal foil.
R
inside metallic objects, e.g. a metal case.
This can affect the functionality of the Smart-
Key.
Do not keep the SmartKey in the temperature-
controlled cup holder (
Y
page 332). On vehicles
with the KEYLESS-GO start function, do not
keep it on the parcel shelf or in the trunk. Oth-
erwise, the SmartKey may not be detected, e.g.
when starting the engine using the Start/Stop
button.
A check which periodically establishes a radio
connection between the vehicle and the Smart-
Key determines whether a valid SmartKey is in
the vehicle. This occurs, for example:
R
when starting the engine
R
whilst driving
R
when using HANDS-FREE ACCESS
R
when the external door handles are touched
R
during convenience closing
SmartKey functions
:
& To lock the vehicle
;
F To open/close the trunk lid
=
% To unlock the vehicle
SmartKey
79
Opening
and
closing
Z
-------------------------------------------------------------------------------------------------------------------------------------------------------------
X
To unlock centrally: press the % button.
If you do not open the vehicle within approx-
imately 40 seconds of unlocking:
R
the vehicle is locked again.
R
anti-theft protection is reactivated.
X
To lock centrally: press the & button.
The SmartKey centrally locks and unlocks the
following components:
R
the doors
R
the trunk lid
R
the fuel filler flap
The turn signals flash once when unlocking and
three times when locking.
You can also set an audible signal to confirm
that the vehicle has been locked. The audible
signal can be activated and deactivated via the
multimedia system; see the separate operating
instructions.
You will receive visual and acoustic locking con-
firmation if all components were able to be
locked.
When the locator lighting is activated via the
multimedia system, it lights up when it is dark
after the vehicle is unlocked with the SmartKey.
Information on activating and deactivating the
locator lighting can be found in the separate
operating instructions.
X
To open the trunk lid automatically from
outside the vehicle: press and hold the F
button until the trunk lid opens.
X
To open the trunk lid automatically from
outside the vehicle: if the SmartKey is loca-
ted in the immediate vicinity of the vehicle,
press the F button on the SmartKey.
When the trunk lid closes you can then
release the button.
KEYLESS-GO
General notes
Bear in mind that the engine can be started by
any of the vehicle occupants if there is a Smart-
Key in the vehicle (
Y
page 164).
Locking/unlocking centrally
You can start, lock or unlock the vehicle using
KEYLESS-GO. To do this, you only need carry the
SmartKey with you. You can combine the func-
tions of KEYLESS-GO with those of a conven-
tional SmartKey. Unlock the vehicle by using
KEYLESS-GO, for instance, and lock it using the
& button on the SmartKey.
The driver's door and the door at which the han-
dle is used, must both be closed. The SmartKey
must be outside the vehicle. When locking or
unlocking with KEYLESS-GO, the distance
between the SmartKey and the corresponding
door handle must not be greater than 3 ft (1 m).
A brief radio connection between the vehicle
and the SmartKey determines whether a valid
SmartKey is in, or in the direct vicinity of, the
vehicle. This occurs, for example:
R
when starting the engine
R
while driving
R
when using HANDS-FREE ACCESS
R
when the external door handles are touched
R
during convenience closing
X
To unlock the vehicle: touch the inner sur-
face of the door handle.
X
To lock the vehicle: touch sensor surface :
or ;.
Make sure that you do not touch the inner
surface of the door handle.
X
Convenience closing feature: touch
recessed sensor surface ; for an extended
period.
Further information on the convenience clos-
ing feature (
Y
page 96).
X
To unlock the trunk lid: pull the handle on
the trunk lid.
Deactivating and activating
If you do not intend to use a SmartKey for an
extended period of time, you can deactivate the
KEYLESS-GO function of the SmartKey. The
SmartKey will then use very little power, thereby
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conserving battery power. For the purposes of
activation/deactivation, the vehicle must not be
nearby.
X
To deactivate: press the & button on the
SmartKey twice in rapid succession.
The battery check lamp (
Y
page 82) of the
SmartKey flashes twice briefly and lights up
once, then KEYLESS-GO is deactivated .
X
To activate: press any button on the Smart-
Key.
or
X
Insert the SmartKey into the ignition lock.
KEYLESS-GO and all of its associated features
are available again.
KEYLESS-GO start function
General notes
Bear in mind that the engine can be started by
any of the vehicle occupants if there is a Smart-
Key in the vehicle (
Y
page 164).
Changing the settings of the locking
system
You can change the settings of the locking sys-
tem. This means that only the driver's door and
the fuel filler flap are unlocked when the vehicle
is unlocked. This is useful if you frequently travel
on your own.
X
To change the setting: press and hold down
the % and & buttons simultaneously
for approximately six seconds until the bat-
tery check lamp flashes twice (
Y
page 82).
If the setting of the locking system is changed
within the signal range of the vehicle, pressing
the & or % button:
R
locks or
R
unlocks the vehicle
The SmartKey now functions as follows:
X
To unlock: press the % button once.
X
To unlock centrally: press the % button
twice.
X
To lock: press the & button.
The KEYLESS-GO function is changed as fol-
lows:
X
To unlock the driver's door: touch the inner
surface of the door handle on the driver's
door.
X
To unlock centrally: touch the inner surface
of the door handle on the front-passenger
door or the rear door.
X
To lock centrally: touch the outer sensor
surface on one of the door handles.
X
To restore the factory settings: press and
hold the % and & buttons simultane-
ously for approximately six seconds until the
battery check lamp flashes twice
(
Y
page 82).
Mechanical key
General notes
If the vehicle can no longer be locked or
unlocked with the SmartKey or KEYLESS-GO,
use the mechanical key.
If you use the mechanical key to unlock and
open the driver's door, the anti-theft alarm sys-
tem will be triggered. Switch off the alarm
(
Y
page 78).
If you unlock the vehicle using the mechanical
key, the fuel filler flap will not be unlocked auto-
matically.
X
To unlock the fuel filler flap: insert the
SmartKey into the ignition lock.
Removing the mechanical key
X
Push release catch : in the direction of the
arrow and at the same time remove mechan-
ical key ; from the SmartKey.
SmartKey
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For further information about:
R
unlocking the driver's door (
Y
page 87)
R
unlocking the trunk (
Y
page 93)
R
locking the vehicle (
Y
page 88)
Inserting the mechanical key
X
Push mechanical key ; completely into the
SmartKey until it engages and release
catch : is back in its basic position.
SmartKey battery
Important safety notes
G
WARNING
Batteries contain toxic and corrosive substan-
ces. If batteries are swallowed, it can result in
severe health problems. There is a risk of fatal
injury.
Keep batteries out of the reach of children. If
a battery is swallowed, seek medical attention
immediately.
H
Environmental note
Batteries contain dangerous
substances. It is against the
law to dispose of them with
the household rubbish. They
must be collected separately
and recycled to protect the
environment.
Dispose of batteries in an
environmentally friendly
manner. Take discharged
batteries to a qualified spe-
cialist workshop or a special
collection point for used bat-
teries.
The SmartKey batteries contain perchlorate
material, which may require special handling
and regard for the environment. National guide-
lines must be observed during disposal. In Cal-
ifornia, see www.dtsc.ca.gov/
HazardousWaste/Perchlorate/index.cfm.
Mercedes-Benz recommends that you have the
batteries replaced at a qualified specialist work-
shop.
Checking the battery
X
Press the & or % button.
The battery is working properly if battery
check lamp : lights up briefly.
The battery is discharged if battery check
lamp : does not light up briefly.
X
Change the battery (
Y
page 82).
If the SmartKey battery is checked within the
signal reception range of the vehicle, pressing
the & or % button:
R
locks or
R
unlocks the vehicle
i
You can obtain a battery from any qualified
specialist workshop.
Replacing the battery
You require a CR 2025 3 V cell battery.
X
Take the mechanical key out of the SmartKey
(
Y
page 81).
X
Press mechanical key ; into the SmartKey
opening in the direction of the arrow until bat-
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tery compartment cover : opens. Do not
hold battery compartment cover : closed
while doing so.
X
Remove battery compartment cover :.
X
Repeatedly tap the SmartKey against your
palm until battery = falls out.
X
Insert the new battery with the positive ter-
minal facing upwards. Use a lint-free cloth to
do so.
X
Make sure that the surface of the battery is
free of lint, grease and other contaminants.
X
Insert the front tabs of battery compartment
cover : into the housing first and then press
to close it.
X
Insert mechanical key ; into the SmartKey
(
Y
page 82).
X
Check the function of all SmartKey buttons on
the vehicle.
SmartKey
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Problems with the SmartKey
Problem
Possible causes/consequences and M Solutions
You can no longer lock or
unlock the vehicle using
the SmartKey.
The SmartKey battery is discharged or nearly discharged.
X
Check the SmartKey battery (
Y
page 82) and replace it if necessary
(
Y
page 82).
If this does not work:
X
Unlock (
Y
page 87) or lock (
Y
page 88) the vehicle using the
mechanical key.
There is interference from a powerful source of radio waves.
X
Unlock (
Y
page 87) or lock (
Y
page 88) the vehicle using the
mechanical key.
The SmartKey is faulty.
X
Unlock (
Y
page 87) or lock (
Y
page 88) the vehicle using the
mechanical key.
X
Have the SmartKey checked at a qualified specialist workshop.
You can no longer lock or
unlock the vehicle using
KEYLESS-GO.
KEYLESS-GO was deactivated.
X
Reactivate KEYLESS-GO (
Y
page 80).
The SmartKey battery is discharged or nearly discharged.
X
Check the SmartKey battery (
Y
page 82) and replace it if necessary
(
Y
page 82).
If this does not work:
X
Unlock (
Y
page 87) or lock (
Y
page 88) the vehicle using the
mechanical key.
There is interference from a powerful source of radio waves.
X
Unlock (
Y
page 87) or lock (
Y
page 88) the vehicle using the
mechanical key.
KEYLESS-GO is malfunctioning.
X
Lock/unlock the vehicle using the remote control function of the
SmartKey.
X
Have the vehicle and SmartKey checked at a qualified specialist
workshop.
If the vehicle can also not be locked/unlocked using the remote con-
trol function:
X
Lock (
Y
page 87) or unlock (
Y
page 88) the vehicle using the
mechanical key.
X
Have the vehicle and SmartKey checked at a qualified specialist
workshop.
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Problem
Possible causes/consequences and M Solutions
The engine cannot be
started using the Smart-
Key.
The on-board voltage is too low.
X
Switch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work:
X
Check the starter battery and charge it if necessary (
Y
page 374).
or
X
Jump-start the vehicle (
Y
page 376).
or
X
Consult a qualified specialist workshop.
The engine cannot be
started using the Start/
Stop button. The Smart-
Key is in the vehicle.
The vehicle is locked.
X
Unlock the vehicle and try to start the vehicle again.
The SmartKey battery is discharged or nearly discharged.
X
Check the SmartKey battery (
Y
page 82) and replace it if necessary
(
Y
page 82).
If this does not work:
X
Start your vehicle with the SmartKey in the ignition lock.
There is interference from a powerful source of radio waves.
X
Start your vehicle with the SmartKey in the ignition lock.
You have lost a Smart-
Key.
X
Have the SmartKey deactivated at a qualified specialist workshop.
X
Report the loss immediately to the vehicle insurers.
X
If necessary, have the locks changed as well.
You have lost the
mechanical key.
X
Report the loss immediately to the vehicle insurers.
X
If necessary, have the locks changed as well.
Doors
Important safety notes
G
WARNING
If children are left unsupervised in the vehicle,
they could:
R
open the doors, thus endangering other
people or road users.
R
get out and disrupt traffic.
R
operate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
R
release the parking brake.
R
shifting the automatic transmission out of
park position P
R
Start the engine.
There is a risk of an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children.
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Unlocking and opening doors from
the inside
You can open a door from inside the vehicle
even if it has been locked. You can only open the
rear doors from inside the vehicle if they are not
secured by the child-proof locks (
Y
page 67). If
the vehicle has been locked with the SmartKey
or with KEYLESS-GO, opening a door from the
inside will trigger the anti-theft alarm system.
Switch off the alarm (
Y
page 78).
X
To unlock and open a front door: pull door
handle ;.
If the door is locked, locking knob : pops up.
The door is unlocked and opens.
X
To unlock a rear door: pull door handle ;.
Locking knob : pops up and the door
unlocks.
X
To open a rear door: pull door handle ;
again.
The door opens.
Centrally locking and unlocking the
vehicle from the inside
You can centrally lock and unlock the vehicle
from the inside. The buttons are located on both
front doors.
X
To unlock: press button :.
X
To lock: press button ;.
If the front-passenger door is closed, the vehi-
cle locks.
If the driver's door is open, the door stays
unlocked.
Meanwhile, the fuel filler flap will not be locked
or unlocked.
You cannot unlock the vehicle centrally from the
inside if the vehicle has been locked with the
SmartKey or KEYLESS-GO.
The doors can be opened from the inside. You
can only open the rear doors from inside the
vehicle if they are not secured by the child-proof
locks (
Y
page 67).
If the vehicle has been locked with the SmartKey
or with KEYLESS-GO, opening a door from the
inside will trigger the anti-theft alarm system.
Switch off the alarm (
Y
page 78).
If a locked door is opened from the inside, the
previous unlock status of the vehicle will be
taken into consideration if:
R
the vehicle was locked using the locking but-
ton for the central locking, or
R
if the vehicle was locked automatically
The vehicle will be fully unlocked if it had previ-
ously been fully unlocked. If only the driver's
door had been previously unlocked, only the
door which has been opened from the inside is
unlocked.
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Automatic locking feature
X
To deactivate: press and hold button : for
approximately five seconds until a tone
sounds.
X
To activate: press and hold button ; for
approximately five seconds until a tone
sounds.
If you press one of the two buttons and do not
hear a tone, the relevant setting has already
been selected.
The vehicle is locked automatically when the
ignition is switched on and the wheels are turn-
ing.
You could therefore be locked out if:
R
the vehicle is being pushed.
R
the vehicle is being towed.
R
the vehicle is on a roller dynamometer.
You can also switch the automatic locking func-
tion on and off using the multimedia system; see
the separate operating instructions.
Power closing
Power closing pulls the doors and trunk lid into
their locks automatically even if they are only
partly closed.
X
To power close a door: push the door into
the lock up to the first detent position.
Power closing will pull the door fully closed.
X
To power close the trunk lid: lightly push
the trunk lid closed.
The power closing function pulls the trunk lid
closed.
Unlocking the driver's door (mechan-
ical key)
If the vehicle can no longer be locked or
unlocked with the SmartKey or KEYLESS-GO,
use the mechanical key.
X
Take the mechanical key out of the SmartKey
(
Y
page 81).
X
Insert the mechanical key as far as it will go
into opening : in the protective cap.
X
Pull and hold the door handle.
X
Pull the protective cap on the mechanical key
as straight as possible away from the vehicle
until it releases.
X
Release the door handle.
X
Insert the mechanical key into the lock of the
driver's door as far as it will go.
X
Turn the mechanical key counter-clockwise
as far as it will go to position 1.
The locking knob pops up and the door
unlocks.
X
Turn the mechanical key back and remove it.
X
Insert the mechanical key into the SmartKey
(
Y
page 82).
X
Carefully press the protective cap onto the
lock cylinder until it engages and is seated
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