Display messages Possible causes/consequences and
0050
0050Solutions 00B2
Engine oil level Engine oil level
Stop, turn engine Stop, turn engine
off off There is not enough or no oil in the engine. There is a danger of
engine damage.
X
Stop the vehicle as soon as possible, paying attention to road
and traffic conditions.
X Check the oil level with the oil dipstick (Y page 253).
X If the engine oil level is correct: have the malfunction rectified
immediately at a qualified specialist workshop.
X If the engine oil level is too low: have the vehicle towed to a
qualified specialist workshop. 00B2
Oil sensor Visit Oil sensor Visit
workshop workshop There is a malfunction in the engine oil level display.
X
Have the vehicle checked immediately at a qualified specialist
workshop. Driving systems
Display messages Possible causes/consequences and
0050 0050Solutions Limit
Limit
... km/h
... km/h The speed display flashes.
The vehicle has exceeded the speed set for variable
SPEEDTRONIC, e.g. on a steep downhill gradient (overrun mode).
X Apply the brakes yourself as required. Cruise control Cruise control
Visit workshop
Visit workshop Cruise control has been deactivated due to a malfunction.
X
Have cruise control checked at a qualified specialist workshop. 216
Display
messagesOn-board computer and displays
Indicator and warning lamps in the instrument cluster
Problem Possible causes/consequences and
0050
0050Solutions 0072
The yellow ASR/
ESP®
warning
lamp flashes
while the vehicle
is in motion. G
WARNING
ESP ®
or ASR is intervening because at least one of the wheels has
reached its tire grip limit.
Cruise control is deactivated for the duration of the intervention.
X Adapt your driving style to suit the road and traffic conditions.
Do not use too much throttle.
X Drive slowly. 0072
The yellow ASR/
ESP®
warning
lamp is lit while
the engine is
running. ASR is deactivated.
G WARNING
The driven wheels can spin when accelerating.
There is an increased risk of skidding and accidents.
X Activate ASR again. Exceptions (Y page 60).0089
0025003D0065
The yellow ESP ®
, ABS
and ASR/BAS indicator
lamps and the red
brake system indicator
lamp are lit while the
engine is running. EBD is malfunctioning or deactivated due to undervoltage or mal-
function.
The battery may not be being charged.
G WARNING
The rear wheels could lock sooner than expected when you apply
the brakes. The braking distance can increase in emergency brak-
ing situations.
There is an increased risk of skidding and accidents.
X Vehicles with steering wheel buttons: also observe the mes-
sages in the display (Y page 199).
X Stop the vehicle as soon as possible, paying attention to road
and traffic conditions.
X Do not drive on.
X Consult a qualified specialist workshop. Indicator and warning lamps in the instrument cluster
221On-board computer and displays Z
Problem Possible causes/consequences and
0050
0050Solutions 0065
The red brake
system indicator
lamp is lit while
the engine is
running. There is insufficient brake fluid in the expansion tank.
G WARNING
Braking performance can be impaired.
There is a risk of an accident.
X Vehicles with steering wheel buttons: also observe the mes-
sages in the display (Y page 199).
X Stop the vehicle as soon as possible, paying attention to road
and traffic conditions.
X Check the brake fluid level in the expansion tank
(Y page 256).
X If the brake fluid is below the MIN mark: do not drive on!
X Do not add brake fluid. This does not solve the problem.
X Consult a qualified specialist workshop. 0065
When towing a
trailer: the red
brake system
indicator lamp is
lit while the
engine is run-
ning.
Additionally, a
warning tone
sounds. G
WARNING
The brake force booster in the trailer is faulty.
The driving and braking characteristics of your vehicle could
change. There is a risk of the trailer overbraking and of you losing
control over the truck/trailer combination.
There is a risk of an accident.
X Vehicles with steering wheel buttons: also observe the mes-
sages in the display (Y page 199).
X Stop the vehicle as soon as possible, paying attention to road
and traffic conditions.
X Do not drive on.
X Consult a qualified specialist workshop. 003D
The yellow ASR/
BAS indicator
lamp is lit while
the engine is
running. ASR has been deactivated due to a malfunction.
The engine power output may be reduced.
G WARNING
The driven wheels can spin when accelerating.
There is an increased risk of skidding and accidents.
X Drive on with care.
X Consult a qualified specialist workshop as soon as possible. 222
Indicator and warning lamps in the instrument clusterOn-board computer and displays
Problem Possible causes/consequences and
0050
0050Solutions 003D
The yellow ASR/
BAS indicator
lamp is lit while
the engine is
running. BAS has been deactivated due to a malfunction.
G WARNING
The brake system continues to function normally, but without
electronic support.
The braking distance can increase in emergency braking situa-
tions.
There is a risk of an accident.
X Drive on with care.
X Visit a qualified specialist workshop immediately. 003D
The yellow ASR/
BAS indicator
lamp is lit while
the engine is
running. ASR and BAS have been deactivated due to undervoltage.
The battery may not be being charged.
G WARNING
The brake system is still available with the normal braking effect.
The driven wheels can spin when accelerating.
The braking distance can increase in emergency braking situa-
tions.
There is an increased risk of skidding and accidents.
X Drive on with care.
X Visit a qualified specialist workshop immediately. Indicator and warning lamps in the instrument cluster
223On-board computer and displays Z
Problem Possible causes/consequences and
0050
0050Solutions 0025
The yellow ABS
indicator lamp is
lit while the
engine is run-
ning. ABS is deactivated due to a malfunction or is temporarily unavail-
able. ESP
®
, ASR and BAS, as well as cruise control, are also
unavailable as a result.
Self-diagnosis may not be complete, or the battery may not be
charging.
G WARNING
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock, e.g. if the
brakes are applied with maximum force.
This causes steerability and braking to be greatly impaired.
The braking distance can increase in emergency braking situa-
tions.
The driven wheels can spin when accelerating.
If ESP ®
is not operational, ESP ®
will not stabilize the vehicle.
There is an increased risk of skidding and accidents.
X Drive a short distance at a speed above 13 mph (20 km/h).
The functions mentioned above are available again when the
indicator lamp goes out.
If the indicator lamp does not go out:
X Drive on with care.
X Visit a qualified specialist workshop immediately. 00E2
The yellow DEF
indicator lamp is
lit while the
engine is run-
ning. The exhaust gas aftertreatment is malfunctioning or the current
Diesel Exhaust Fluid (DEF) supply is limiting the vehicle range.
X
Observe the messages in the display. 0089
The yellow ESP ®
indicator lamp is
lit while the
engine is run-
ning. ESP
®
is deactivated due to undervoltage or a malfunction. As a
result, cruise control has also been deactivated.
Engine power output may be reduced.
The battery may not be being charged.
G WARNING
If ESP ®
is not operational, ESP ®
will not stabilize the vehicle.
There is an increased risk of skidding and accidents.
X Vehicles with steering wheel buttons: also observe the mes-
sages in the display (Y page 199).
X Drive on with care.
X Visit a qualified specialist workshop immediately. 224
Indicator and warning lamps in the instrument clusterOn-board computer and displays
Problem Possible causes/consequences and
0050
0050Solutions 0075
The red warning
lamp does not
go out approx-
imately
4 seconds after
the ignition is
switched on, or
it lights up again. The restraint systems have malfunctioned.
G WARNING
If the restraint systems are malfunctioning, individual systems
could be triggered inadvertently or might not be triggered at all in
the event of an accident.
There is an increased risk of injury and accidents.
X Drive on with care.
X Visit a qualified specialist workshop immediately. 003D
The red battery
indicator lamp is
lit while the
engine is run-
ning. The battery is not being charged. Possible causes are a defective
alternator or a torn poly-V-belt.
X
Stop the vehicle as soon as possible, paying attention to road
and traffic conditions.
X Check the poly-V-belt.
X If the poly-V-belt is torn: do not continue driving. Consult the
nearest qualified specialist workshop.
X If the poly-V-belt is not damaged: have the vehicle checked as
soon as possible by a qualified specialist workshop. 003D
The red battery
indicator lamp is
lit while the
engine is run-
ning. The battery is faulty.
X
Stop the vehicle as soon as possible, paying attention to road
and traffic conditions.
X Do not continue driving under any circumstances.
X Consult a qualified specialist workshop. 0026
The yellow brake
pad wear indica-
tor lamp is lit
after the engine
is started or
while the vehicle
is in motion. The brake pads/linings have reached their wear limit.
G WARNING
Braking performance can be impaired.
There is a risk of an accident.
X Have the brake pads/linings replaced as soon as possible at a
qualified specialist workshop. 00B2
The yellow
engine oil level
warning lamp is
lit after the
engine is started
or while the vehi-
cle is in motion. The oil level has dropped to the minimum level.
X
Check the engine for oil loss.
X If oil loss is detected: consult a qualified specialist workshop
immediately.
X If no oil loss is detected: check the oil level and add engine oil
(Y page 253). Indicator and warning lamps in the instrument cluster
225On-board computer and displays Z
Problem Possible causes/consequences and
0050
0050Solutions 00B2
The yellow
engine oil level
warning lamp
flashes and the
warning buzzer
sounds after the
engine is started
or while the vehi-
cle is in motion. On vehicles with a diesel engine, the oil level display additionally
appears in the display, e.g.
– 2.0 qts
– 2.0 qts (Canada:– 2.0 ltr – 2.0 ltr).
There is not enough or no oil in the engine.
There is a danger of engine damage.
X Stop the vehicle as soon as possible, paying attention to road
and traffic conditions.
X Check the oil level with the oil dipstick (Y page 253).
X If the engine oil level is correct: have the malfunction rectified
immediately at a qualified specialist workshop.
X If the engine oil level is too low: have the vehicle towed to a
qualified specialist workshop. 00B2
The yellow
engine oil level
warning lamp
lights up and the
warning buzzer
sounds after the
engine is started
or while the vehi-
cle is in motion. The engine oil level is above the maximum level.
There is a risk of damaging the engine or catalytic converter.
X
Check the oil level.
X If the oil level is too high: have the engine oil extracted as soon
as possible at a qualified specialist workshop.
X If the oil level is correct: have the malfunction rectified as soon
as possible at a qualified specialist workshop. 00B2
On vehicles with
a diesel engine,
the yellow
engine oil level
warning lamp
lights up repeat-
edly during the
journey. There is a malfunction in the engine oil level display.
X
Have the vehicle checked immediately at a qualified specialist
workshop. 003F
The yellow cool-
ant level warning
lamp lights up
while the engine
is running. The coolant level is too low.
Never run the engine if the coolant level is too low. The engine
could overheat and be damaged.
X
Stop the vehicle as soon as possible, paying attention to road
and traffic conditions.
X Switch off the engine and let it cool down.
X Add coolant and be sure to observe the warning notes
(Y page 255).
X If you need to add coolant frequently, have the engine cooling
system checked at a qualified specialist workshop. 226
Indicator and warning lamps in the instrument clusterOn-board computer and displays
Problem Possible causes/consequences and
0050
0050Solutions 00AC
The red coolant
warning lamp is
lit while the
engine is run-
ning. The coolant temperature is too high.
X
Stop the vehicle as soon as possible, paying attention to road
and traffic conditions.
X Consult a qualified specialist workshop. 00AC
The red coolant
warning lamp is
lit while the
engine is run-
ning. The coolant temperature is too high.
If the vehicle is stopped after being subjected to extreme loads,
the coolant warning lamp may come on when the ignition is
switched on or the engine is restarted. Such loads can be, for
example, driving in mountainous terrain or driving with a trailer.
X
Run the engine for approximately 1 minute at idling speed.
X Consult a qualified specialist workshop if the display message
continues to be shown. 00B5
0077
The yellow
reserve fuel
warning lamp is
on. At the same
time,
0 0, appears
in the fuel tank
content display
while the engine
is running,
although there is
fuel in the fuel
tank. The fuel filler cap is not closed.
X
Close the fuel filler cap.
You will hear a click when the fuel filler cap is closed fully.
X If the malfunction continues to be displayed, have it rectified
immediately at a qualified specialist workshop. 00B9
The yellow
engine diagnos-
tic indicator
lamp is lit up or
flashes while the
engine is run-
ning. You have used up all fuel in the tank.
The engine is running in emergency mode.
X
Refuel at the nearest gas station (Y page 148).
X Bleed the fuel system (Y page 143).
X Start the engine three to four times in succession after refueling.
Emergency running mode will be canceled. The vehicle does not
need to be checked. 00B9
The yellow
engine diagnos-
tic indicator
lamp is lit up or
flashes while the
engine is run-
ning. The injection control is malfunctioning.
The engine is running in emergency mode.
Engine power output may be reduced.
X
Have the vehicle checked at a qualified specialist workshop as
soon as possible.
In some states it is legally prescribed that after the check engine
indicator lamp lights up you must contact a qualified specialist
workshop immediately. Observe the legal requirements. Indicator and warning lamps in the instrument cluster
227On-board computer and displays Z