
This function pertains to the
Inst. cluster
Inst. cluster
(instrument cluster) menu, the Lighting
Lighting
menu and the Vehicle
Vehiclemenu.
Using the steering wheel buttons
X Press the 0080or007F button repeatedly
until the Settings
Settings menu appears in the
display.
X Press the 0063button to switch to the sub-
menu selection.
X Press the 0081or0082 button to select the
Convenience
Convenience submenu.
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 0063or0064 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 4 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 Press the 0063or0064 button to select
Range
Range.
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 refuel Please refuel
message is shown instead of the range. On-board computer (vehicles with steering wheel buttons)
195On-board computer and displays Z

Display messages
Possible causes/consequences and
0050
0050Solutions Err
Err flashes for 5 seconds, the
00B0indicator lamp also flashes and
then lights up constantly.
Lane Keeping Assist is deactivated and temporarily inoperative.
Possible causes are:
R There are no lane markings present.
R The camera's functionality is impaired due to heavy rain, snow or
fog.
R The camera cannot recognize the road markings:
- It is too dark.
- The lane markings are worn or are covered, for example, by
dirt or snow.
R The windshield is dirty in the camera's field of vision.
X Stop the vehicle paying attention to road and traffic conditions.
X Secure the vehicle to prevent it from rolling away (Y page 149).
X Clean the windshield (Y page 267), particularly in the camera's
field of vision.
If the 00B0 indicator lamp goes out, Lane Keeping Assist is
operational again.
If the problem persists, visit a qualified specialist workshop. 0099
dEF Chk dEF Chk In addition, the yellow
00B9Check Engine indicator lamp and the
yellow 00E2DEF indicator lamp light up and a warning tone
sounds.
The DEF reducing agent is contaminated, diluted or is not compli-
ant with ISO 2224 1.
After the first message and under normal operating conditions,
you can drive on for up to approximately 50 miles (80 km). Then a warning tone sequence sounds and the engine can only be started
another 10 times.
X Have the DEF tank cleaned and refilled at a qualified specialist
workshop as soon as possible. 200
Display messagesOn-board computer and displays

Display messages
Possible causes/consequences and
0050
0050Solutions 0099
dEF Chk dEF Chk In addition, the yellow
00E2DEF indicator lamp lights up and a
warning tone sounds.
The DEF supply has dropped below 1.5 US gal (5.5 l).
After the message appears for the first time, and under normal
driving conditions, the remaining DEF supply will last for approx-
imately 1000 miles (1600 km).
After that, the 0.8 US gal (3.0 l) reserve mark is reached. A warning tone sequence sounds and the engine can then only be started
another 16 times.
X Add DEF (Y page 147).
The 00E2 DEF indicator lamp disappears after no more than
20 seconds after the vehicle has stopped or you have switched
on the ignition or started the engine after refueling. 0099
StArtS RExx StArtS RExx In addition, the yellow
00E2DEF indicator lamp lights up and a
warning tone sequence sounds.
After the message appears for the first time, the engine can only be started another 10 times.
The number of remaining engine starts XX
XX (1010 to0 0) is shown in the
message every time the engine is started. When the number of
remaining engine starts is 0 0the engine management prevents the
vehicle being driven at a speed exceeding 5 mph (8 km/h). The
Idle Mode
Idle Mode message appears in the multifunction display. The DEF reducing agent is contaminated, diluted or is not compli-
ant with ISO 22241.
X Have the DEF tank cleaned and refilled at a qualified specialist
workshop as soon as possible. The exhaust gas aftertreatment is 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. Display messages
201On-board computer and displays Z

Display messages
Possible causes/consequences and
0050
0050Solutions 0099
StArtS RExx StArtS RExx In addition, the yellow
00E2DEF indicator lamp lights up and a
warning tone sequence sounds.
The DEF supply has dropped below the 0.8 US gal (3.0 l) reserve
mark.
After the message appears for the first time, the remaining DEF
supply will last for approximately 1000 miles (1600 km). The
engine can then only be started another 16 times.
The number of remaining engine starts XX XX(1616 to1
1) is shown in the
message every time the engine is started.
X Add at least 2.0 US gal (7.6 l) of DEF (Y page 147).
The 00E2 DEF indicator lamp disappears after no more than
20 seconds after the vehicle has stopped or you have switched
on the ignition or started the engine after refueling. 0099
StArtS IdLE StArtS IdLE If the message
StArtS IdLE
StArtS IdLEis displayed, you cannot drive the
vehicle at a speed exceeding 5 mph (8 km/h).
X Add at least 2.0 US gal (7.6 l) of DEF (Y page 147).
The 00E2 DEF indicator lamp disappears after no more than
20 second safter the vehicle has stopped or you have switched
on the ignition or started the engine after refueling. Err
Err flashes for 5 seconds, the
00CEindicator lamp also flashes and
then goes out.
Highbeam Assist is deactivated and temporarily not operational or
Highbeam Assist is malfunctioning.
Possible causes are:
R The camera's functionality is impaired due to heavy rain, snow or
fog.
R The windshield is dirty in the camera's field of vision.
X Stop the vehicle paying attention to road and traffic conditions.
X Secure the vehicle to prevent it from rolling away (Y page 149).
X Clean the windshield (Y page 267), particularly in the camera's
field of vision.
If the 00CE indicator lamp goes out, Highbeam Assist is opera-
tional again.
If the problem persists, visit a qualified specialist workshop. 202
Display messagesOn-board computer and displays

Display messages
Possible causes/consequences and
0050
0050Solutions Blind_Err
Blind_Err flashes for 5 seconds, the yellow indicator lamps flash in the exte-
rior mirrors and then light up constantly.
Blind Spot Assist is faulty.
X Visit a qualified specialist workshop. Err Err flashes for 5 seconds, the
00C7indicator lamp also flashes and
then lights up constantly.
COLLISION PREVENTION ASSIST is malfunctioning.
X Visit a qualified specialist workshop. Display
messages
203On-board computer and displays Z

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 100).
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 100).
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 100).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 100).0049
Lights on auto‐ Lights on auto‐
matic. Remove key matic. 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 (Y page 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 (Y page 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).3
Depending on the equipment, the bulb-failure indicator may not be featured for any lamps other than the turn
signals. 208
Display messagesOn-board computer and displays

Display messages
Possible causes/consequences and
0050
0050Solutions 0049
Third brake lamp Third brake lamp The high-mounted 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. 0049
High beam left High beam left The left high-beam headlamp is faulty
3
.
X Replace the bulb as soon as possible (Y page 100).0049
High beam right High beam right The right high-beam headlamp is faulty
3
.
X Replace the bulb as soon as possible (Y page 100).0049
License plate lamp License plate lamp A license plate lamp is faulty
3
.
X Replace the bulb as soon as possible (Y page 103).0049
Switch off lights Switch off lights You have forgotten to switch off the lights when leaving the vehi-
cle.
X Turn the light switch to 003F.0049
Foglamp front left Foglamp front left The left-hand front fog lamp is faulty.
3
X Have the bulb replaced as soon as possible at a qualified spe-
cialist workshop. 0049
Foglamp Foglamp
front
frontright
right The right-hand front fog lamp is faulty
3
.
X Have the bulb replaced as soon as possible at a qualified spe-
cialist workshop. 0049
Rear foglamp Rear foglamp The rear foglamp is faulty
3
.
X Replace the bulb as soon as possible (Y page 103).0049
Parking Parking
lamp
lampfront
front
left
left The front left parking lamp/standing lamp is faulty
3
.
X Replace the bulb as soon as possible (Y page 100).0049
Parking Parking
lamp
lampfront
front
right
right The front right parking lamp/standing lamp is faulty
3
.
X Replace the bulb as soon as possible (Y page 100).0049
Reverse lamp Reverse lamp A reversing lamp is faulty
3
.
X Replace the bulb as soon as possible (Y page 103).3
Depending on the equipment, the bulb-failure indicator may not be featured for any lamps other than the turn
signals. Display
messages
209On-board computer and displays Z

Engine
Display messages
Possible causes/consequences and
0050
0050Solutions Exhaust Filter:
Exhaust Filter:
Drive at high Drive at high
engine speed. See engine speed. See
Oper. Manual Oper. Manual The automatic regeneration of the diesel particle filter is not suf-
ficient or has malfunctioned.
X Drive at an engine speed of above 2000 rpm until the display
message disappears.
If the display message does not go out after approximately
20 minutes, have the malfunction rectified immediately at a
qualified specialist workshop. Check Diesel Check Diesel
Exhaust Fluid See Exhaust Fluid See
Operator's Manual Operator's Manual The Diesel Exhaust Fluid (DEF) supply has dropped below
1.5 US gal (5.5 l).
After the message appears for the first time, and under normal
driving conditions, the remaining DEF supply will last for approx-
imately 1000 miles (1600 km).
After that, the 0.8 US gal (3.0 l) reserve mark is reached. A warning
tone sequence sounds and the engine can then only be started
another 16 times.
X Add DEF supply (Y page 147).
After topping up, the system check takes approximately
20 seconds. The display message then disappears. Check Diesel Check Diesel
Exhaust Fluid See Exhaust Fluid See
Operator's Manual Operator's Manual If the yellow
00B9Check Engine indicator lamp lights up as well,
the DEF reducing agent is contaminated, diluted or not compliant
with ISO 22241.
After the first message and under normal operating conditions,
you can drive on for up to approximately 50 miles (80 km). Then a
warning tone sequence sounds and the engine can only be started
another 10 times.
Have the DEF tank cleaned and refilled at a qualified specialist
workshop as soon as possible. 00E2
XX XX
starts
starts remaining
remaining The Diesel Exhaust Fluid (DEF) supply has dropped below the
0.8 US gal (3.0 l) reserve mark.
After the message appears for the first time, the remaining DEF
supply will last for approximately 1000 miles (1600 km). The
engine can then only be started another 16 times.
The number of remaining engine starts
XX
XX (1616 to0 0) is shown in the
message every time the engine is started.
X Add at least 2.0 US gal (7.6 l) of DEF (Y page 147).
The display message disappears no more than 20 seconds after
the vehicle has stopped or you have switched on the ignition or started the engine after refueling. Display messages
211On-board computer and displays Z