
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 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. 204
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
205On-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 254).
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. 206
Display
messagesOn-board computer and displays

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

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

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

Display messages
Possible causes/consequences and
0050
0050Solutions Check tire(s)
Check tire(s)
0054 The pressure of one or more tires has dropped significantly. If the
tire pressure monitor has detected the affected wheel, the wheel
position is also displayed.
X Stop the vehicle as soon as possible, paying attention to road
and traffic conditions.
X Check the tires.
X Repair or change the wheel if necessary (Y page 305).
X Check the tire pressure and correct it if necessary
(Y page 291).
The display message disappears automatically after driving for a
few minutes with the corrected tire pressure. Warning Warning
Tire
Tiredefect
defect
0054 One or more tires is losing air rapidly. If the tire pressure monitor
has detected the affected wheel, the wheel position is also dis-
played.
X Stop the vehicle without making any sudden steering or braking
maneuvers, paying attention to the traffic conditions as you do so.
X Repair or change the wheel (Y page 305).Vehicle
Display messages
Possible causes/consequences and
0050 0050Solutions 003D
Battery/Alterna‐ Battery/Alterna‐
tor Visit workshop tor Visit workshop 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 a
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. 00E6
Electrical Step Electrical Step The electrical step has retracted or extended only partially or not
at all.
X Make sure there is sufficient free 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 74). Before stepping out, remind
the passengers that the step is missing. 216
Display
messagesOn-board computer and displays