
button on the steering wheel or the
0007reset
button.
You cannot hide display messages of the
highest priority. These messages will
continue to be shown in the display until their
cause has been eliminated.
The on-board computer stores certain display
messages in the message memory
(Y page 193).
The following shows all the messages that
could appear in the display, arranged
alphabetically. Message memory
The on-board computer only records and
shows malfunctions and warnings from
certain systems .Therefore, make sure that
your vehicle is safe to use. You could cause
an accident by driving an unsafe vehicle.
The on-board computer stores certain display
messages. In the Message memory menu,
you can call up stored display messages.
Using the steering wheel buttons
X Press the 0010or0007 button repeatedly
until the number of stored display
messages, e.g. 2 messages , appears in the
display.
If no malfunctions have occurred, the Nomessages message appears.
X Scroll through the stored display messages
with the 0001or0009 button.
X To exit the message memory menu:
press the 0010or0007 button.
When you switch off the ignition, all display
messages are deleted from the message
memory. Display messages
193On-board computer and displays Z

Display messages Possible causes/consequences and
0004 Solutions
0002
Cornering
lt. right The right-hand cornering ligh
tis faulty 2
.
X Replace the bulb as soon as possible (Y page 98).0002
Lights on
automatical.
Remove key The automatic headlamp feature is active: the light switch is in the
0007
position and you have forgotten to remove the key.
X Remove the key from the ignition lock. 0002
Turn signal left The left-hand turn signal is faulty.
X
Change the bulb as soon as possible in the front (Y page 98) or
rear (Y page 99) indicator lamp. 0002
Turn signal right The right-hand turn signal is faulty.
X
Change the bulb as soon as possible in the front (Y page 98) or
rear (Y page 99) indicator lamp. 0002
Brake lamp left The left-hand brake lamp is faulty.
2
X Replace the bulb as soon as possible (Y page 99).0002
Brake lamp right The right brake lamp is faulty.
2
X Replace the bulb as soon as possible (Y page 99).0002
Third brake lamp The high-mounted brake lamp is faulty.
2
This display message will
only appearifa ll LEDs have failed.
X Consult a qualified specialized workshop as soon as possible. 0002
High beam left The left-hand high-beam is faulty.
2
X Replace the bulb as soon as possible (Y page 98).0002
High-beam right The right-hand high-beam is faulty.
2
X Replace the bulb as soon as possible (Y page 98).0002
License plate lamp Al
icense plate lamp is faulty. 2
X Replace the bulb as soon as possible (Y page 100).0002
Switch off lights You have forgotten to switch off the lights when leaving the
vehicle.
X
Turn the light switch to 000C.2
Depending on the equipment, the bulb-failure indicator may not be featured for any lamps other than the
turn signals. 202
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
0004 Solutions
The DE
Freducing agent is contaminated, diluted or is not
compliant with ISO 22241.
X Have the DEFt ank cleaned and refilled at a qualified specialist
workshop immediately. The exhaust gas aftertreatmen
tis malfunctioning or an emission
relevant malfunction has occurred. This malfunction or defect can
damage the exhaust gas aftertreatment.
X Visit a qualified specialist workshop immediately. 0014
Coolant
Stop, turn
engine off 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. 0014
Coolant
Stop, turn
engine off 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 1minute at idling speed.
X Consult a qualified specialist workshop if the display message
continues to be shown. 0017
Check
coolant level The coolan
tlevel 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 324).
X If you need to add coolant frequently, have the engine cooling
system checked at a qualified specialist workshop. 0016
Reserve
fuel Drive
to a filling stat. The fuel level has fallen into the reserve range.
X Refuel at the nearest gas station (Y page 142).000E
Water in fuel
Visit workshop The water that has collected in the water separator has reached
the maximum level.
X
Drain the water separator (Y page 247). Display messages
205On-board computer and displays Z

Problem Possible causes/consequences and
0004 Solutions
0008
The red 0008
warning lamp
does not go out
approximately
4s econds after
the ignition is
switched on, or
it lights up again. The restraint systems have malfunctioned.
G WARNING
If SRS is 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. 0010
The red battery
indicator lamp is
lit while the
engine is
running. 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. 0010
The red battery
indicator lamp is
lit while the
engine is
running. 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. 0005
The yellow brake
pad wear
indicator 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. 001D
The yellow
engine oil level
warning lamp is
lit after the
engine is started
or while the
vehicle 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: chec kthe oil level and add engine oil
(Y page 243). 214
Indicator and warning lamps in the instrument clusterOn-board computer and displays

Problem Possible causes/consequences and
0004 Solutions
0014
The red coolant
warning lamp is
lit while the
engine is
running. 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. 0014
The red coolant
warning lamp is
lit while the
engine is
running. 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 1minute at idling speed.
X Consult a qualified specialist workshop if the display message
continues to be shown. 0016
0006
The yellow
reserve fuel
warning lamp is
on. At the same
time
0 appears
in the fuel tank
conten tdisplay
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 clic kwhen the fuel filler cap is closed fully.
X If the malfunction continues to be displayed, have it rectified
immediately at a qualified specialist workshop. 0018
The yellow
engine
diagnostic
indicator lamp is
lit up or flashes
while the engine
is running. 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 142).
X Bleed the fuel system (Y page 137).
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. 216
Indicator and warning lamps in the instrument clusterOn-board computer and displays

Problem Possible causes/consequences and
0004 Solutions
0018
The yellow
engine
diagnostic
indicator lamp is
lit up or flashes
while the engine
is running. 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. 0018
The yellow
check engine
indicator lamp is
lit while the
engine is
running. The exhaust gas aftertreatment is malfunctioning or an emission
relevant malfunction has occurred. This malfunction or defect can
damage the exhaust gas aftertreatment.
After the first message and under normal operating conditions,
you can drive on for up to approximately 500 mi (800 km). Then
a warning tone sequence sounds and the engine can only be
started another 16 times.
X
Observe the messages in the display.
X Have the exhaust gas aftertreatment checked immediately at a
qualified specialist workshop.
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. 000D
If you turn the
key to
position 2in the
ignition lock, the
yellow preglow
indicator lamp
remains lit for
approximately
one minute. Or
the yellow
preglow
indicator lamp
lights up for
approximately
one minute while
the engine is
running. At extremely low temperatures, the engine may not start.
There is a malfunction in the preglow system.
X
Have any malfunction rectified at a qualified specialist
workshop. Indicator and warning lamps in the instrument cluster
217On-board computer and displays Z

Problem Possible causes/consequences and
0004 Solutions
0013
The yellow air
filter indicator
lamp is lit while
the engine is
running. The service limit for the air filter has been reached. The air filter
is dirty.
X
Have the air filter element replaced as soon as possible at a
qualified specialist workshop. 000A
The yellow tire
pressure
monitor warning
lamp comes on. G
WARNING
The tire pressure monitor indicates a rapid or severe loss of
pressure in at least one tire.
X Stop the vehicle without making any extreme steering
maneuvers or braking suddenly. Pay attention to the traffic
conditions while doing so.
X Check the tires and correctt he tire pressure. If a tire continues
to lose pressure, it must be replaced. Replace damaged tires
immediately.
The warning light will go out after the flat tire has been rectified
and you have been driving for a few minutes.
X Vehicles with steering wheel buttons: also observe the
messages in the display (Y page 192).000A
US vehicles
only:
The yellow tire
pressure
monitor warning
lamp flashes for
60 seconds and
then remains lit. The tire pressure monitor has malfunctioned.
X
Have the tire pressure monitor and the wheels checked at a
qualified specialist workshop. 000E
The yellow water
separator
indicator lamp is
lit when the
ignition is
switched on. The water that has collected in the water separator of the fuel filter
has reached the maximum level.
X
Drain the water separator (Y page 247).218
Indicator and warning lamps in the instrument clusterOn-board computer and displays

Problem Possible causes/consequences and
0004 Solutions
000F
The yellow
washer fluid
level indicator
lamp for the
windshield
washer/
headlamp
cleaning system
is lit after the
engine is started
or while the
vehicle is in
motion. The water level is too low.
X
Add washer fluid (Y page 246). 0014
If you turn the
key in the
ignition lock to
position 2, the
red seat belt
warning lamp
lights up for
approximately
6s econds. The warning lamp is to remind you to fasten your seat belt.
X
Fasten seat belt (Y page 48). 0002
When the key is
turned to
position 2in the
ignition lock, the
yellow bulb
warning lamp
lights up. One of the exterior lighting bulbs is faulty, with the exception of
the perimeter lamps and the trailer lighting.
i
Depending on the equipment, the bulb failure indicator can fail
for all lamps with the exception of the turn signal lamps.
X Replace the faulty bulb as soon as possible (Y page 96).0004
The yellow "door
open" indicator
lamp is lit while
driving. The vehicle is moving without all doors or the hood being closed.
X
Close the doors or hood. 0004
The yellow "door
open" indicator
lamp is lit. The electrical step has retracted or extended only partially or not
at all.
X Make sure there is sufficien tfree space for the electrical step.
X Open or close the sliding door again.
X If the electrical step still does not extend or retract fully, push
the step in manually (Y page 72). Before stepping out, remind
the passengers that the step is missing. Indicator and warnin
glamps in the instrument cluster
219On-board computer and displays Z