Page 185 of 298
Display messages
Possible causes/consequences and
0050
0050Solutions 0075
Left Side Curtain Left Side Curtain
Airbag Malfunction Airbag Malfunction
Service Required Service Required
or
Right Side Curtain
Right Side Curtain
Airbag Malfunction Airbag Malfunction
Service Required Service Required The left-hand or right-hand window curtain air bag is malfunctioning.
The 0075 warning lamp also lights up in the instrument cluster.
G WARNING
The left or right window curtain air bag may either be triggered unin-
tentionally or, in the event of an accident, may not be triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop immediately. Display
messages
183On-board computer and displays Z
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Display messages
Possible causes/consequences and
0050
0050Solutions Front
Front
Passenger
Passenger Air‐
Air‐
bag Disabled See
bag Disabled See
Operator's Manual Operator's Manual The front passenger front air bag is deactivated during the journey,
although:
R an adult
or
R a person of the corresponding stature is on the front passenger seat
If additional forces are applied to the seat, the system may interpret
the occupant's weight as lower than it actually is.
G WARNING
The front passenger front air bag does not deploy during an accident.
There is an increased risk of injury.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 127).
X Switch the ignition off.
X Have the occupant on the front passenger seat get out of the vehi-
cle.
X Keep the seat unoccupied, close the front passenger door and
switch on the ignition.
X Observe the PASSENGER AIR BAG indicator lamps in the center
console and the multifunction display and check the following:
Seat unoccupied and ignition switched on:
R a self-diagnosis is carried out. The PASSENGER AIR BAG OFF and
PASSENGER AIR BAG ON indicator lamps must light up simulta-
neously for approximately six seconds
R the PASSENGER AIR BAG OFF indicator lamp must then light up
and remain lit after the self-diagnosis. If the indicator lamp is on,
OCS (Occupant Classification System) has disabled the front
passenger front air bag (Y page 48)
R the display messages Front Passenger Airbag Enabled Front Passenger Airbag Enabled
See Operator's Manual
See Operator's Manual orFront Passenger Airbag Dis‐
Front Passenger Airbag Dis‐
abled See Operator's Manual
abled See Operator's Manual must not appear in the multi-
function display
X Wait for a period of at least 60 seconds until the necessary system
checks have been completed.
X Make sure that the display messages do not appear in the multi-
function display.
If these conditions are fulfilled, the front passenger seat can be occu- pied again. Whether the PASSENGER AIR BAG OFF indicator lamp
remains lit or goes out depends on how OCS classifies the occupant.
If the conditions are not fulfilled, the system is not operating correctly.
X Visit a qualified specialist workshop immediately.
For further information about the Occupant Classification System, see
(Y page 48). 184
Display
messagesOn-board computer and displays
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Display messages
Possible causes/consequences and
0050
0050Solutions Front
Front
Passenger
Passenger Air‐
Air‐
bag Enabled See
bag Enabled See
Operator's Manual Operator's Manual The front passenger front air bag and front passenger knee bag are
enabled during the journey, although:
R a child, a small adult or an object weighing less than the system's
weight threshold is located on the front passenger seat
or
R the front passenger seat is unoccupied
The system may detect objects or forces applying additional weight on
the seat.
G WARNING
The front passenger front air bag and the front passenger knee bag
may be deployed unintentionally.
There is an increased risk of injury. X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 127).
X Switch the ignition off.
X Open the front passenger door.
X Remove the child and the child restraint system from the front
passenger seat.
X Make sure that there are no objects on the seat adding to the
weight.
The system might otherwise detect the additional weight and inter-
pret the seat occupant's weight as greater than it actually is.
X Keep the seat unoccupied, close the front passenger door and
switch on the ignition.
X Observe the PASSENGER AIR BAG indicator lamps in the center
console and the multifunction display and check the following:
Seat unoccupied and ignition switched on:
R a self-diagnosis is carried out. The PASSENGER AIR BAG OFF and
PASSENGER AIR BAG ON indicator lamps must light up simulta-
neously for approximately six seconds
R the PASSENGER AIR BAG OFF indicator lamp must then light up
and remain lit after the self-diagnosis. If the indicator lamp is on,
OCS has disabled the front passenger front air bag and front
passenger knee bag (Y page 48)
R the display messages Front Passenger Airbag Enabled
Front Passenger Airbag Enabled
See Operator's Manual See Operator's Manual orFront Passenger Airbag Dis‐
Front Passenger Airbag Dis‐
abled See Operator's Manual
abled See Operator's Manual must not appear in the multi-
function display
X Wait for a period of at least 60 seconds until the necessary system
checks have been completed.
X Make sure that the display messages do not appear in the multi-
function display.
If these conditions are fulfilled, the front passenger seat can be occu- pied again. Whether the PASSENGER AIR BAG OFF or ON indicator
lamp remains lit or goes out depends on how OCS classifies the occu-
pant. Display
messages
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Display messages
Possible causes/consequences and
0050
0050Solutions If the conditions are not fulfilled, the system is not operating correctly.
X Visit a qualified specialist workshop immediately.
For further information about the Occupant Classification System, see
(Y page 48). Lights
Display messages
Possible causes/consequences and
0050
0050Solutions 0049
Check Check
Left
Left Low
LowBeam
Beam
(example) The corresponding bulb is faulty.
X Visit a qualified specialist workshop.
i LED light sources: the display message for the corresponding
lamp only appears when all the LEDs in the lamp have failed. 0049
Malfunction See Malfunction See
Operator’s Manual Operator’s Manual The exterior lighting is faulty.
X Visit a qualified specialist workshop. 0049
Automatic Headlamp Automatic Headlamp
Mode Inoperative Mode Inoperative The light sensor is defective.
X Visit a qualified specialist workshop. 0049
Switch Off Lights Switch Off Lights The lights are still switched on when you leave the vehicle. A warning
tone also sounds.
X Turn the light switch to the 0058or0058 position. Adaptive Highbeam
Adaptive Highbeam
Assist Inoperative Assist Inoperative Adaptive Highbeam Assist is faulty.
X
Visit a qualified specialist workshop. Adaptive Highbeam Adaptive Highbeam
Assist Currently Assist Currently
Unavailable See Unavailable See
Operator's Manual Operator's Manual Adaptive Highbeam Assist is deactivated and temporarily inoperative.
Possible causes are:
R the windshield in the camera's field of vision is dirty
R visibility is impaired due to heavy rain, snow or fog
X Clean the windshield.
If the system detects that the camera is fully operational, the Adap‐
Adap‐
tive
tive Highbeam
Highbeam Assist
AssistNow
NowAvailable
Available display message is shown.
Adaptive Highbeam Assist is operational again. 186
Display
messagesOn-board computer and displays
Page 189 of 298

Engine
Display messages
Possible causes/consequences and
0050
0050Solutions 00BD
Check Check
Coolant
Coolant Level
Level
See Operator's Man‐
See Operator's Man‐
ual ual The coolant level is too low.
! Avoid longer journeys when there is insufficient coolant in the
engine cooling system. You could otherwise damage the engine.
X Add coolant, observing the warning notes before doing so
(Y page 239).
X If coolant needs to be added more often than usual, have the engine
coolant system checked at a qualified specialist workshop. 00AC The fan motor is faulty.
X At coolant temperatures below 248 ‡(120 †), drive to the nearest
qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving in moun-
tainous terrain and stop-and-go traffic. 00AC
Coolant Too Hot Coolant Too Hot
Stop Vehicle Turn Stop Vehicle Turn
Engine Off Engine Off The coolant is too hot.
A warning tone also sounds.
G WARNING
Do not drive when your engine is overheated. This can cause some
fluids which may have leaked into the engine compartment to catch
fire.
Steam from the overheated engine can also cause serious burns which can occur just by opening the hood.
There is a risk of injury.
X Pull over and stop the vehicle safely and switch off the engine, pay-
ing attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 127).
X Wait until the engine has cooled down.
X Make sure that the air supply to the engine radiator is not blocked,
e.g. by snow, slush or ice.
X Do not start the engine again until the display message goes out and
the coolant temperature is below 248 ‡ (120 †). Otherwise, the
engine could be damaged.
X Pay attention to the coolant temperature gage.
X If the temperature increases again, visit a qualified specialist work-
shop immediately.
Under normal operating conditions and with the specified coolant
level, the coolant temperature may rise to 248 ‡ (120 †). Display messages
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Display messages
Possible causes/consequences and
0050
0050Solutions 003D
See Operator's Man‐ See Operator's Man‐
ual ual The battery is not being charged.
A warning tone also sounds.
Possible causes are:
R a defective alternator
R a torn poly-V-belt
R a malfunction in the electronics
! Do not drive any further. Otherwise the engine may overheat.
X Pull over and stop the vehicle safely and switch off the engine, pay-
ing attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 127).
X Consult a qualified specialist workshop. 003D
Stop Vehicle See Stop Vehicle See
Operator's Manual Operator's Manual The battery is no longer being charged and the condition of charge is
too low.
A warning tone also sounds.
X Pull over and stop the vehicle safely and switch off the engine, pay-
ing attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 127).
X Observe the instructions in the 003DSee Operator's Manual
See Operator's Manual
display message.
X Consult a qualified specialist workshop. 003D
Start Engine See Start Engine See
Operator's Manual Operator's Manual The engine is off and the battery condition of charge is too low.
X
Switch off electrical consumers that you do not need, such as the
rear window defroster and interior lighting.
X Leave the engine running for a few minutes or drive a long distance.
The battery is being charged. 00B2
Check Engine Oil Check Engine Oil
Level (Add 1 quart) Level (Add 1 quart) The engine oil level has dropped to the minimum level.
! Avoid longer journeys when there is insufficient engine oil. You
could otherwise damage the engine.
X Check the oil level when next refueling, at the latest (Y page 236).
X If necessary, add engine oil (Y page 238).
X Have the engine checked at a qualified specialist workshop if engine
oil needs to be added more often than usual.
Information on approved engine oils can be obtained from a qualified
specialist workshop or on the Internet at http://bevo.mercedes-
benz.co m. 00B2
Engine Oil Level Engine Oil Level
Low Stop Vehicle Low Stop Vehicle
Turn Engine Off Turn Engine Off 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, pay-
ing attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 127).
X Check the engine oil level (Y page 236).
X If necessary, add engine oil (Y page 238).188
Display messagesOn-board computer and displays
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Display messages
Possible causes/consequences and
0050
0050Solutions 00B2
Engine Oil Reduce Engine Oil Reduce
Oil Level Oil Level You have added too much engine oil. The engine or catalytic converter
may be damaged.
X Siphon off excess engine oil until it is at the specified level. Observe
the legal requirements. 00B2
Engine Oil Level Engine Oil Level
Cannot Be Measured Cannot Be Measured The measuring system is faulty.
X
Visit a qualified specialist workshop. 00B6
Fuel Level Low Fuel Level Low The fuel level has dropped into the reserve range.
X Refuel at the nearest gas station. 00A8 There is only a very small amount of fuel in the fuel tank.
X Refuel at the nearest gas station without fail. 00B6
Gas Cap Loose Gas Cap Loose 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. Driving systems
Display messages
Possible causes/consequences and
0050 0050Solutions 00AD
ATTENTION ASSIST: ATTENTION ASSIST:
Take a Break! Take a Break! Based on certain criteria, ATTENTION ASSIST has detected fatigue or
a lack of concentration on the part of the driver. 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. 00AD
ATTENTION ASSIST ATTENTION ASSIST
Inoperative Inoperative ATTENTION ASSIST is inoperative.
X Visit a qualified specialist workshop. 00AB
Malfunction Malfunction There is a malfunction in the chassis. The vehicle's handling charac-
teristics may be affected.
X Visit a qualified specialist workshop. Display
messages
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Display messages
Possible causes/consequences and
0050
0050Solutions Lane
Lane
Keeping
Keeping Assist
Assist
Currently Unavaila‐
Currently Unavaila‐
ble See Operator's ble See Operator's
Manual Manual Lane Keeping Assist is deactivated and temporarily inoperative.
Possible causes are:
R the windshield in the camera's field of vision is dirty
R visibility is impaired due to heavy rain, snow or fog
R there have been no lane markings for an extended period
R the lane markings are worn away, dark or covered up, e.g. by dirt or
snow
When the causes stated above no longer apply, the display message
disappears.
Lane Keeping Assist is operational again.
If the display message does not disappear:
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 127).
X Clean the windshield. Lane Lane
Keeping
Keeping Assist
Assist
Inoperative
Inoperative Lane Keeping Assist is defective.
X Visit a qualified specialist workshop. Blind Spot Assist
Blind Spot Assist
Currently Unavaila‐ Currently Unavaila‐
ble See Operator's ble See Operator's
Manual Manual Blind Spot Assist is temporarily inoperative.
Possible causes are:
R the radar sensor system is outside the operating temperature range
R the radar sensor system is temporarily inoperative, e.g. due to elec-
tromagnetic radiation emitted by nearby TV or radio stations or
other sources of electromagnetic radiation
When the causes stated above no longer apply, the display message
disappears.
Blind Spot Assist is operational again.
If the display message does not disappear:
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 127).
X Restart the engine. Blind Spot Assist Blind Spot Assist
Inoperative Inoperative Blind Spot Assist is malfunctioning.
X
Visit a qualified specialist workshop. 00D9
Off Off The HOLD function is deactivated. The vehicle is skidding.
A warning tone also sounds.
X Reactivate the HOLD function later (Y page 145). 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 145). 190
Display
messagesOn-board computer and displays