Page 209 of 334

Display messages
Possible causes/consequences and
0050
0050Solutions ESP
ESP
Visit workshop Visit workshop
ESP
®
has been deactivated due to a malfunction. As a result,
cruise control has also been deactivated.
Engine power output may be reduced.
G WARNING
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. ESP ESP
Unavailable Unavailable
ESP
®
has been deactivated due to undervoltage. As a result, cruise
control has also been deactivated.
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 Drive on with care.
X Consult a qualified specialized workshop as soon as possible. 0066
Parking brake Parking brake
Release brake Release brake Additionally, a warning tone sounds.
You are driving with the parking brake applied.
X Release the parking brake (Y page 150).0076
Seatbelt sys. Seatbelt sys.
Visit workshop Visit workshop The belt system has malfunctioned.
G WARNING
In the event of an accident or a rapid deceleration, the seat belts
either cannot protect you as intended.
There is a risk of injury.
X Consult a qualified specialized workshop as soon as possible. 0075
Restraint system Restraint system
Visit workshop Visit workshop The restraint system is faulty.
G WARNING
If the restraint system 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. Display
messages
207On-board computer and displays Z
Page 210 of 334

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
Page 211 of 334

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
Page 212 of 334

Display messages
Possible causes/consequences and
0050
0050Solutions 0049
Tail lamp left Tail lamp left The left-hand tail lamp is faulty.
3
X Replace the bulb as soon as possible (Y page 103).0049
Tail lamp right Tail lamp right The right-hand tail lamp is faulty.
3
X Replace the bulb as soon as possible (Y page 103).0049
Perim. lamps Perim. lamps A perimeter lamp is faulty.
3
X Replace the bulb as soon as possible (Y page 105).Highbeam Assist
Highbeam Assist
inoperative inoperative Highbeam Assist is faulty.
X Visit a qualified specialist workshop. Highbeam Assist
Highbeam Assist
temporarily temporarily
unavailable unavailable Highbeam Assist is deactivated and temporarily inoperative.
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 malfunction has been rectified, the Highbeam Assist Highbeam Assist
Now Available
Now Available message appears. 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
Page 213 of 334

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
Page 214 of 334

Display messages
Possible causes/consequences and
0050
0050Solutions 00E2
Idle Mode Idle Mode The vehicle cannot be driven at a speed exceeding 5 mph
(8 km/h).
The DEF reducing agent is contaminated, diluted or is not compli-
ant with ISO 2224 1.
X Have the DEF tank cleaned and refilled at a qualified specialist
workshop immediately. 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. 00AC
Coolant Coolant
Stop,
Stop,turn
turn
engine off
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 1 minute at idling speed.
X Consult a qualified specialist workshop if the display message
continues to be shown. 00BC
Coolant Coolant
Check
Checklevel
level 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 325).
X If you need to add coolant frequently, have the engine cooling
system checked at a qualified specialist workshop. 00B5
Reserve Reserve
fuel
fuelDrive
Drive
to a filling stat.
to a filling stat. The fuel level has fallen into the reserve range.
X Refuel at the nearest gas station (Y page 145).00B8
Water in fuel Water in fuel
Visit workshop Visit workshop The water that has collected in the water separator has reached
the maximum level.
X Drain the water separator (Y page 255).212
Display messagesOn-board computer and displays
Page 215 of 334

Display messages
Possible causes/consequences and
0050
0050Solutions 00B2
Engine Engine
oil
oilAdd
Add 1.0
1.0
quart(Canada: 1.0
quart(Canada: 1.0
liter) liter) The oil level is too low.
X Check the oil level the next time you refuel (Y page 250), and
add oil. 00B2
Engine oil level Engine oil level
Not when eng. run‐ Not when eng. run‐
ning ning You want to check the engine oil level even though the engine is
still running.
X Switch off the engine.
X Check the oil level (Y page 250).00B2
Engine oil level Engine oil level
Reduce oil level Reduce oil level You have added too much engine oil. There is a risk of damaging
the engine or catalytic converter.
X Check the oil level (Y page 250).
X If the oil level is too high: have the engine oil extracted at the
next qualified specialist workshop.
X If the oil level is correct: have the malfunction rectified at the
next qualified specialist workshop. 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 251).
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. Display
messages
213On-board computer and displays Z
Page 216 of 334

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