Mercedes-Benz ML320. Manual — part 105

247

Practical hints

What to do if …

Problem

Possible cause

Suggested solution

¿

The yellow BAS/ESP malfunc-
tion indicator lamp comes on
while driving.

The charging voltage has fallen below
10 volts. The BAS and the ESP have switched
off.

When the voltage is above this value
again, the BAS and ESP are operational
again.

왘

If necessary, have the generator and
the battery checked.

¿

The yellow BAS/ESP malfunc-
tion indicator lamp comes on
while driving.

The BAS or the ESP is malfunctioning.

왘

Continue driving with added caution.

왘

Have the BAS/ESP checked at an au-
thorized Mercedes-Benz Light Truck
Center as soon as possible.

Failure to follow these instructions
increases the risk of an accident.

248

Practical hints

What to do if …

Problem

Possible cause

Suggested solution

?

The yellow “CHECK ENGINE”
malfunction indicator lamp
comes on while driving.

There is a malfunction of:

앫

The fuel management system

앫

The ignition system

앫

The emission control system

앫

Systems which affect emissions

Such malfunctions may result in excessive
emissions values and may switch the engine
to its limp-home (emergency operation)
mode.

왘

Have the vehicle checked as soon as
possible by an authorized
Mercedes-Benz Light Truck Center.
An on-board diagnostic connector is
used by the service station to link the
vehicle to the shop diagnostics sys-
tem. It allows the accurate identifica-
tion of system malfunctions through
the readout of diagnostic trouble
codes. It is located in the front left
area of the footwell next to the park-
ing brake pedal.

The fuel cap is not closed tightly.

Check the fuel cap (

컄

page 214).

Your fuel tank is empty.

왘

After refuelling start the engine three
or four times in succession.

The limp-home mode is canceled. You do
not need to have your vehicle checked.

249

Practical hints

What to do if …

Problem

Possible cause

Suggested solution

/

The yellow coolant warning lamp
comes on when the engine is
running.

The coolant is to hot.

The coolant level is too low.

왘

Stop as soon as possible and allow
the engine and coolant to cool down.

왘

Check the coolant level and add
coolant if necessary (

컄

page 222).

If the warning lamp comes on frequently,
there is a leak in the cooling system.

왘

Have the cooling system checked by
an authorized Mercedes-Benz Light
Truck Center.

The coolant temperature gauge is above
248°F (120 °C).

The coolant level is too low.

왘

Stop as soon as possible and allow
the engine and coolant to cool down.

왘

Add coolant to prevent engine from
overheating (

컄

page 222).

If the coolant level is correct, the electrical
radiator fan may be broken.

왘

If the coolant temperature is below
the red zone, drive on to the nearest
authorized Mercedes-Benz Light
Truck Center.

Avoid high engine loads (e.g. driving
uphill) and stop-and-go driving.

250

Practical hints

What to do if …

Warning!

G

Driving when your engine is badly overheat-
ed can cause some fluids which may have
leaked into the engine compartment to
catch fire. You could be seriously burned.

Steam from an overheated engine can cause
serious burns and can occur just by opening
the engine hood. Stay away from the engine
if you see or hear steam coming from it.

Turn off the engine, get out of the vehicle
and do not stand near the vehicle until the
engine has cooled down.

Warning!

G

Do not spill antifreeze on hot engine parts.
Antifreeze contains ethylene glycol which
may burn if it comes into contact with hot
engine parts. You can be seriously burned.

!

Do not ignore the coolant warning
lamps. Extended driving with the sym-
bol displayed may cause serious engine
damage not covered by the
Mercedes-Benz Limited Warranty.

Do not drive without sufficient amount
of coolant. The engine will overheat,
causing major engine damage.