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!
The oil level is too low. Avoid long journeys with too little engine oil. There is a risk of
engine damage.
The display messages and the corresponding symbol that indicate that the oil level is too
low must not be ignored. Display messages Possible causes/consequences and
M Solutions4
Engine Oil Level
Low Stop Vehicle
Turn Engine Off Vehicles without an oil dipstick: the engine oil level is too low.
There is a risk of engine damage.
X
Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Apply the parking brake.
X Add engine oil ( Y page 459) and check the oil level
(Y page 457). 4
Engine Oil Level
Too High Vehicles without an oil dipstick: you have added too much engine
oil. There is a risk of damage to the engine or to the catalytic
converter.
X
Have the excess oil siphoned off at a qualified specialist
workshop. Observe the legal requirements. 4
Engine Oil Level
Cannot Be Measured Vehicles without an oil dipstick: the measuring system is
defective.
X
Visit a qualified specialist workshop. 8
Reserve Fuel The fuel level has dropped into the reserve range.
X
Refuel at the nearest gas station. C There is only a very small amount of fuel in the fuel tank.
X
Refuel at the nearest gas station without fail. 8
Gas Cap Loose The fuel system pressure is too low. The fuel filler cap is not closed
correctly or the fuel system is leaking.
X
Check that the fuel filler cap is correctly closed.
If the fuel filler cap is not correctly closed:
X Close the fuel filler cap.
If the fuel filler cap is correctly closed:
X Visit a qualified specialist workshop. 8
Ultra Low-sulfur
Diesel Fuel Only Vehicles with a diesel engine: the fuel level has fallen below the
reserve range.
X
Refuel at the nearest gas station.
X Only use commercially available vehicular ULTRA-LOW SULFUR
HIGHWAY DIESEL FUEL (ULSD, 15 ppm SULFUR MAXIMUM). Display messages
407On-board computer and displays Z
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Display messages Possible causes/consequences and
M Solutions¸·
Replace Air Filter Vehicles with a diesel engine: the engine air filter is dirty and must
be replaced.
X
Visit a qualified specialist workshop. !
Check Fuel Filter Vehicles with a diesel engine: there is water in the fuel filter. The
water must be drained off.
X
Visit a qualified specialist workshop. Ø
Check
Additive See
Oper. Manual The DEF tank is empty.
X
Have the DEF tank filled as soon as possible at a qualified
specialist workshop
(Y page 321).Ø
Remaining Starts:
16 The DEF level has fallen to a minimum.
X
Have the DEF tank filled immediately at a qualified specialist
workshop. (Y page 321) Driving systems
Display messages Possible causes/consequences and
M SolutionsÀ
Attention Assist:
Pause! Based on specific criteria, ATTENTION ASSIST
21
has determined
that
the driver is tired or paying less attention. A warning tone also
sounds.
X If necessary, take a break.
During long journeys, take regular breaks in good time so you get
enough rest. À
Attention Assist
Inoperative ATTENTION ASSIST
21
has failed.
X Visit a qualified specialist workshop. Á
Night View Assist
Inoperative Night View Assist Plus is defective.
X
Visit a qualified specialist workshop. 21
Not available on hybrid vehicles.408
Display messages
On-board computer and displays
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Display messages Possible causes/consequences and
M SolutionsÁ
Night View Assist
Currently
Unavailable The temperature of the camera is too high.
X
Wait until you see the Night View Assist Available
Again display message.
You can also:
X Fold the camera cover down ( Y page 467).
X Adjust the air distribution of the automatic air conditioning
upwards. Á
Night View Assist
Lights
Must Be Set
to AUTO or ON A condition for activating Night View Assist Plus has not been
fulfilled.
X
Turn the light switch to c or L.Á
Night View Assist
Not
In Reverse Gear A condition for activating Night View Assist Plus has not been
fulfilled.
X
Shift the transmission to P, N or D.Á
Night View Assist
Lights
ON or AUTO,
Not in R Gear A condition for activating Night View Assist Plus has not been
fulfilled.
X
Turn the light switch to c or L.
X Shift the transmission to P, N or D.Á
Night View Assist
Only When It Is
Dark You have attempted to activate Night View Assist Plus in the
daytime.
Night View Assist Plus can only be activated when it is dark.
¨
Vehicle Rising Your vehicle is adjusting to the level you have selected.
¨
Vehicle Rising
Please
Wait Briefly The vehicle level is too low when the vehicle is stationary. A
warning tone also sounds.
X
Do not pull away.
The vehicle level is set when the display message disappears. ¨
STOP Car Too Low You have pulled away while the vehicle level is still too low.
AIRMATIC sets the vehicle to the selected level after a short
period.
X
Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Apply the electric parking brake.
X Wait until the display message disappears before pulling away. Display messages
409
On-board computer and displays Z
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Display messages Possible causes/consequences and
M SolutionsG
Risk of accident
AIRMATIC is defective. A warning tone also sounds.
X Do not drive faster than 50 mph (80 km/h).
X Make only slight steering movements. Otherwise, the front
fender
or the tires could be damaged if the steering movement
is too large.
X Listen for scraping sounds.
X Pull over and stop the vehicle safely, paying attention to road
and traffic conditions, and select a higher vehicle level.
Depending on the malfunction, it may be possible to raise the
vehicle.
X Visit a qualified specialist workshop. ¨
Malfunction G
Risk of accident
The AIRMATIC function is restricted. The vehicle's handling
characteristics may be affected.
X Do not drive faster than 50 mph (80 km/h).
X Visit a qualified specialist workshop. ABC
Malfunction Stop
Vehicle The ABC (Active Body Control) vehicle level is too low.
X
Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
After
a few seconds, the vehicle level is adjusted and the display
message disappears. The vehicle is leaking oil.
The display message is shown continuously.
X
Pull over and stop the vehicle safely as soon as possible, paying
attention
to road and traffic conditions. Do not continue driving
under any circumstances.
X Notify a qualified specialist workshop or breakdown service. The display message is shown continuously.
ABC is malfunctioning.
X
Do not drive faster than 50 mph (80 km/h).
X Make only slight steering movements. Otherwise, the front
fender
or the tires could be damaged if the steering movement
is too large.
X Listen for scraping sounds.
X Visit a qualified specialist workshop.410
Display messages
On-board computer and displays
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Display messages Possible causes/consequences and
M SolutionsABC
Vehicle Rising
Please
Wait Briefly The ABC vehicle level is too low when the vehicle is stationary.
X
Do not pull away.
The vehicle level is set when the display message disappears. ABC
Malfunction The ABC function is restricted. The vehicle's handling
characteristics may be affected.
X
Do not drive faster than 50 mph (80 km/h).
X Visit a qualified specialist workshop. HOLD
Off The HOLD function is deactivated. The vehicle is skidding.
A warning tone also sounds.
X
Reactivate the HOLD function later (Y page 342). The HOLD function is deactivated. When the brake pedal is firmly
depressed, an activation condition is not fulfilled.
A warning tone also sounds.
X
Check the activation conditions for the HOLD function
(Y page 342). Radar Sensors
Deactivated See
Oper. Manual The radar sensor system is deactivated.
X
Switch on the radar sensor system (Y page 387). Lane Keeping
Assist Currently
Unavailable. See
Operator's Manual
or
Lane Keeping
Assist Currently
Unavailable. See
Operator's Manual Lane Keeping Assist or Active Lane Keeping Assist is deactivated
and temporarily inoperative if:
R
the windshield is dirty in the camera's field of vision.
R visibility is impaired due to heavy rain, snow or fog.
R there are no lane markings for a longer period.
R the
lane markings are worn, dark or covered, for example by dirt
or snow.
Lane Keeping Assist or Active Lane Keeping Assist is operational
again and the display message disappears if:
R the dirt (e.g. slush) drops away while the vehicle is in motion.
R the system recognizes that the camera is fully operational again.
If the display message continues to be displayed:
X Clean the windshield. Lane Keeping
Assist Inoperative
or
Active Lane
Keeping Assist
Inoperative Lane Keeping Assist or Active Lane Keeping Assist is defective.
X
Visit a qualified specialist workshop. Display messages
411
On-board computer and displays Z
Page 414 of 536

Display messages Possible causes/consequences and
M SolutionsBlind Spot Assist
Currently
Unavailable See
Oper. Manual
or
Active Blind Spot
Assist Currently
Unavailable See
Oper. Manual Blind Spot Assist or Active Blind Spot Assist is temporarily
inoperative if:
R
the sensors are dirty.
R its function is impaired due to heavy rain or snow.
R the radar sensor system is outside the operating temperature
range.
R the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio
stations or other sources of electromagnetic radiation.
The yellow 9 indicator lamps also light up in the exterior
mirrors.
Blind Spot Assist or Active Blind Spot Assist is operational again
and the display message disappears if:
R the dirt (e.g. slush) drops away while the vehicle is in motion.
R the system detects that the sensors are fully available again.
R the radar sensor system is back within the operating
temperature range.
If the display message continues to be displayed:
X Clean the sensors ( Y page 467).
X Restart the engine. Blind Spot Assist
Inoperative
or
Active Blind Spot
Assist Inoperative Blind Spot Assist or Active Blind Spot Assist is defective.
The yellow
9 indicator lamps also light up in the exterior
mirrors.
X Visit a qualified specialist workshop. Parking Guidance
Inoperative Parking Guidance is malfunctioning (
Y page 350).
X Restart the engine.
If the display message continues to be displayed:
X Visit a qualified specialist workshop.412
Display messages
On-board computer and displays
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Display messages Possible causes/consequences and
M SolutionsParking Guidance
Canceled Parking Guidance has been deactivated because:
R
the vehicle is skidding.
R the sensors are dirty.
R a malfunction has occurred.
X Reactivate Parking Guidance later ( Y page 350).
If the parking space symbol is not displayed in the multifunction
display when you are driving at a speed of less than 19 mph
(30 km/h
):
X Clean the sensors ( Y page 467).
X Restart the engine.
If the parking space symbol is still not displayed in the
multifunction
display when you are driving at a speed of less than
19 mph (30 km/h):
X Visit a qualified specialist workshop. Parking Guidance has been deactivated because you are no longer
following the recommended path.
X
Park again and, while doing so, observe the display messages
in the multifunction display. Parking Guidance
Finished The vehicle is parked. A warning tone also sounds.
The display message disappears automatically.
DISTRONIC PLUS
Off DISTRONIC PLUS has been deactivated (
Y page 332). If it was
deactivated automatically, a warning tone also sounds. DISTRONIC PLUS
Available Again DISTRONIC PLUS is operational again after having been
temporarily
unavailable. You can now reactivate DISTRONIC PLUS
(Y page 332). Display messages
413
On-board computer and displays Z
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Display messages Possible causes/consequences and
M SolutionsDISTRONIC PLUS
Currently
Unavailable See
Operator's Manual DISTRONIC PLUS is deactivated and is temporarily inoperative if:
R
the DISTRONIC PLUS cover in the radiator grill is dirty.
R its function is impaired due to heavy rain or snow.
R the sensors in the bumpers are dirty.
R the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio
stations or other sources of electromagnetic radiation.
R the system is outside the operating temperature range.
R the on-board voltage is too low.
A warning tone also sounds.
DISTRONIC PLUS is operational again and the display message
disappears if:
R the dirt (e.g. slush) drops away while the vehicle is in motion.
R the system detects that the sensors are fully available again.
R the system is within the operating temperature range.
If the display message continues to be displayed:
X Clean the DISTRONIC PLUS cover in the radiator grill
(Y page 467).
X Clean the bumpers ( Y page 467).
X Restart the engine. DISTRONIC PLUS
Inoperative DISTRONIC PLUS is defective. BAS PLUS (Brake Assist PLUS) and
PRE-SAFE
®
Brake may be inoperative as well.
A warning tone also sounds.
X Visit a qualified specialist workshop. DISTRONIC PLUS
Override You have depressed the accelerator pedal. DISTRONIC PLUS is no
longer controlling the speed of the vehicle.
X
Take your foot off the accelerator pedal. DISTRONIC PLUS
--- mph An activation condition for DISTRONIC PLUS is not fulfilled.
X
Check the activation conditions for DISTRONIC PLUS
(Y page 332).414
Display messagesOn-board computer and displays