
X
Press the 0063button to select the Key
Key
function.
The selection marker is on the current set-
ting.
X Press the 0081or0082 button to activate
or deactivate key dependency. Trip computer menu
General notes You can call up or reset statistical data for the
vehicle in the Trip computer menu.
i When you call up the trip computer again,
it displays the last function called up.
The units of the statistical information dis-
played are set permanently for each spe-
cific country, and are therefore independ-
ent of the units selected in the Settings
Settings
menu.
Trip computer "After start" or "After
reset" Example: "After start" trip computer
0043
Distance
0044 Time
0087 Average speed
0085 Average fuel consumption
Using the steering wheel buttons
X Press the 0080or007F button to select
After start
After start.
Or
X Press the 0041or0068 button to select
After reset After reset.
The values in the After start
After startsubmenu
refer to the start of the journey. The values in the
After reset
After reset submenu are calculated
from the last time the trip computer was
reset.
The After start After start trip computer function is
automatically reset if:
R the ignition has been switched off for more
than four hours.
R 999 hours have been exceeded.
R 9,999 miles have been exceeded.
The After reset
After reset trip computer is automati-
cally reset if the value exceeds 9,999 hours
or 99,999 miles.
i If you turn the key to position 0in the
ignition lock or remove it, all the values are
reset after approximately four hours.
The values will not be reset if you turn the
key back to position 1or 2during this time.
Calling up the range Using the steering wheel buttons
X
Press the 0080or007F button to select
After start After start.
X Select Range
Rangeusing the 0041or0068 but-
ton.
The approximate distance which can be
covered with the tank's current contents
and your current style of driving is shown.
i If there is only a small amount of fuel left
in the fuel tank, the 00B5Please refuelPlease refuel
message is shown instead of the range.
Resetting the trip computer Using the steering wheel buttons
X
Press the 0080or007F button to select
After start After start.
X Press the 0041or0068 button to select the
function you would like to reset.
X Press and hold the 0045reset button until the
values are reset to "0". On-board computer (vehicles with steering wheel buttons)
197On-board computer and displays Z

Display messages on vehicles with steering wheel buttons
Safety systems Display messages Possible causes/consequences and
0050
0050Solutions ABS
ABS
Visit workshop Visit workshop
ABS has been deactivated due to a malfunction. ESP
®
, ASR and
BAS, as well as cruise control, have also been deactivated as a
result.
G WARNING
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
This causes steerability and braking to be greatly impaired. The
braking distance can increase in emergency braking situations.
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 on with care.
X Visit a qualified specialist workshop immediately. ABS ABS
Unavailable Unavailable ABS is temporarily unavailable or is deactivated due to undervolt-
age. ESP
®
, ASR and BAS, as well as cruise control, are also
unavailable as a result.
The battery may not be being charged.
G WARNING
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
This causes steerability and braking to be greatly impaired. The
braking distance can increase in emergency braking situations.
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 for a short distance at a speed of more than 13 mph
(20 km/h).
If the display message disappears, the functions mentioned
above are available again.
If the display message continues to be displayed:
X Drive on with care.
X Visit a qualified specialist workshop immediately. 206
Display
messagesOn-board computer and displays

Display messages Possible causes/consequences and
0050
0050Solutions 003D
Visit workshop Visit workshop 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 Visit a qualified specialist workshop immediately. 003D
Visit workshop Visit workshop 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
Unavailable Unavailable ASR and BAS have been deactivated due to undervoltage.
The battery may not be being charged.
G WARNING
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
The braking distance can increase in emergency braking situa-
tions. The driven wheels can spin when accelerating.
There is an increased risk of skidding and accidents.
X Drive on with care.
X Visit a qualified specialist workshop immediately. 0026
Brake wear Visit Brake wear Visit
workshop workshop The brake pads/linings have reached their wear limit.
X
Have the brake pads/linings replaced as soon as possible at a
qualified specialist workshop. Display
messages
207On-board computer and displays Z

Display messages Possible causes/consequences and
0050
0050Solutions 0065
Brake fluid Visit Brake fluid Visit
workshop workshop There is insufficient brake fluid in the fluid reservoir.
G WARNING
Braking performance can be impaired.
There is a risk of an accident.
X Stop the vehicle as soon as possible, paying attention to road
and traffic conditions.
X Check the brake fluid level in the brake fluid reservoir
(Y page 256).
If the brake fluid is below the MIN mark:
X Do not continue driving under any circumstances.
X Do not add brake fluid. This does not solve the problem.
X Consult a qualified specialist workshop.
If the brake fluid is above the MIN mark:
X Drive on with care.
X Visit a qualified specialist workshop immediately. 0065
Brake Brake
force
forcedistri‐
distri‐
bution
bution EBD has been deactivated due to undervoltage.
The battery may not be being charged.
G WARNING
The rear wheels could lock when you apply the brakes. The braking
distance can increase in emergency braking situations.
There is an increased risk of skidding and accidents.
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. 0065
Brake Brake
force
forcedistri‐
distri‐
bution Visit work‐
bution Visit work‐
shop shop EBD has been deactivated due to a malfunction.
G WARNING
The rear wheels could lock when you apply the brakes. The braking
distance can increase in emergency braking situations.
There is an increased risk of skidding and accidents.
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. 208
Display
messagesOn-board computer and displays

Lights
Display messages Possible causes/consequences and
0050
0050Solutions 0049
Low beam left Low beam left The left-hand low beam is faulty
3
.
X Halogen headlamps: replace the bulb as soon as possible
(Y page 101).
X Bi-Xenon headlamps: consult a qualified specialist workshop
as soon as possible. 0049
Low beam right Low beam right The right-hand low-beam headlamp is faulty
3
.
X Halogen headlamps: replace the bulb as soon as possible
(Y page 101).
X Bi-Xenon headlamps: consult a qualified specialist workshop
as soon as possible. 0049
Cornering lt. left Cornering lt. left The left-hand cornering light is faulty
3
.
X Replace the bulb as soon as possible (Y page 101).0049
Cornering Cornering
lt.
lt.right
right The right-hand cornering light is faulty
3
.
X Replace the bulb as soon as possible (Y page 101).0049
Lights on automat‐ Lights on automat‐
ical. Remove key ical. Remove key The automatic headlamp feature is active: the light switch is in the
0058
position and you have forgotten to remove the key.
X Remove the key from the ignition lock. 0049
Turn signal left Turn signal left The left-hand turn signal is faulty.
X
Change the bulb as soon as possible in the front ( Ypage 102)
or rear (Y page 103) indicator lamp. 0049
Turn signal right Turn signal right The right-hand turn signal is faulty.
X
Change the bulb as soon as possible in the front ( Ypage 102)
or rear (Y page 103) indicator lamp. 0049
Brake lamp left Brake lamp left The left brake lamp is faulty
3
.
X Replace the bulb as soon as possible (Y page 103).0049
Brake lamp right Brake lamp right The right brake lamp is faulty
3
.
X Replace the bulb as soon as possible (Y page 103).0049
Third brake lamp Third brake lamp The third brake lamp is faulty
3
. This display message will only
appear if all LEDs have failed.
X Consult a qualified specialized workshop as soon as possible. 3
Depending on the equipment, the bulb-failure indicator may not be featured for any lamps other than the
turn signals. 210
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 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 00B9
The yellow
Check Engine
indicator lamp is
lit while the
engine is run-
ning. 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. 0028
If you turn the
key to posi-
tion2in the igni-
tion lock, the
yellow preglow
indicator lamp
remains lit for
approximately
1 minute. Or the
yellow preglow
indicator lamp
lights up for
approximately
1 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 work-
shop. 009F
The yellow air fil-
ter 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. 228
Indicator and warning lamps in the instrument clusterOn-board computer and displays