
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

Driving systems
Display messages
Possible causes/consequences and
0050
0050Solutions 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. Lane
Lane
Keep.
Keep. Assist
Assist
Temporarily
Temporarily
Unavailable Unavailable and the
00B0indicator lamp lights up.
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. Lane Lane
Keep.
Keep. Assist
Assist
Inoperative
Inoperative Lane Keeping Assist is faulty.
X Have Lane Keeping Assist checked at a qualified specialist
workshop. Blind Spot Assist Blind Spot Assist
Inoperative Inoperative Blind Spot Assist is faulty.
X Have Blind Spot Assist checked at a qualified specialist work-
shop. Collision Preven‐
Collision Preven‐
tion tion
Assist
Assist Inoper‐
Inoper‐
ative
ative COLLISION PREVENTION ASSIST is faulty.
X Have COLLISION PREVENTION ASSIST checked at a qualified
specialist workshop. 214
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
0050
0050Solutions 003E
Hood open Hood open You are already driving at walking pace, even though the hood is
not closed.
X Close the hood. 0064
Please enter PIN: Please enter PIN: You have not yet entered your PIN in the mobile phone.
X Enter the PIN for the SIM card. 003E
Doors open Doors open You are already driving at walking pace, even though not all the
doors are closed.
X Close the doors. 00B1
Check wash. fluid Check wash. fluid
level level The washer fluid level is too low.
X Add washer fluid (Y page 255).Key
Display messages
Possible causes/consequences and
0050
0050Solutions 0039
Replace key Visit Replace key Visit
workshop workshop The key is no longer working.
X Visit a qualified specialist workshop. Indicator and warning lamps in the instrument cluster
When switching on the ignition, some systems carry out a self-test. Some indicator and warn- ing lamps may temporarily turn on or start to flash. This is not an indication of any problem.
Only when these indicator and warning lights turn on or start flashing after the engine has
started or during the journey has a malfunction occurred. Indicator and warning lamps in the inst
rumentcluster
217On-board computer and displays Z

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 251). 222
Indicator and warning lamps in the instrument clusterOn-board computer and displays