2012 MERCEDES-BENZ CLS-Class parking

Display messagesPossible causes/consequences and M SolutionsXVisit a qualified specialist workshop immediately.GWARNING
If the 45 indicator lamp remains off even after performing the above corrective steps, do
not have any children 12 years old and under and other small individuals use the front-passenger
seat until the system has been repaired.
Display messagesPossible causes/consequences and M SolutionsFront Passenger
Airbag Disabled
See Operator's
ManualThe front-passenger air bag and the front-passenger knee bag are
deactivated during the journey even though an adult or a person
larger than a certain size is occupying 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.XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XEngage the parking brake.XSwitch off the ignition.XHave the occupant get out of the vehicle.XKeep the seat unoccupied, close the front-passenger door and
switch on the ignition.
Observe the 45(Y page 43) indicator lamp and the
multifunction display and check the following:
Seat unoccupied and ignition switched on:
R the 45 indicator lamp must light up and remain lit. When
the indicator lamp is on, OCS ( Y page 43) has deactivated the
front-passenger air bag and front-passenger knee bag.
R the Front Passenger Airbag Enabled See Operator's
Manual or Front Passenger Airbag Disabled See
Operator's Manual display messages must not appear in the
multifunction display. Wait for a period of at least 60 seconds
until the necessary system checks have been completed and to
make sure that the display messages do not appear in the
multifunction display.
If these conditions are met, the front-passenger seat can be
occupied again. Whether the 45 indicator lamp remains lit
or goes out depends on how OCS classifies the occupant.
If the conditions are not met, the system is not operating correctly.
XVisit a qualified specialist workshop immediately.Display messages223On-board computer and displaysZ

Display messagesPossible causes/consequences and M Solutionsb
Check Left Tail
and Brake Lamps
or Check Right Tail
and Brake LampsThe left or right-hand tail lamp/brake lamp is defective.XVisit a qualified specialist workshop.b
Check Left High
Beam or Check Right
High BeamThe left or right-hand high beam is defective.XVisit a qualified specialist workshop.b
Check Front Left
Parking Lamp
or Check Front
Right Parking LampThe front left or front right standing lamp is defective.XVisit a qualified specialist workshop.b
Check Left Reverse
Lamp or Check Right
Reverse LampThe left or right-hand backup lamp is defective.XReplace the bulb ( Y page 112).
or
XVisit a qualified specialist workshop.b
Check Front Left
Sidemarker Lamp
or Check Front
Right Sidemarker
LampThe left or right front side marker lamp is defective.XVisit a qualified specialist workshop.b
Check Rear Left
Sidemarker Lamp
or Check Rear Right
Sidemarker LampThe rear left or right side marker lamp is defective.XVisit a qualified specialist workshop.b
Check Left Daytime
Running Light
or Check Right
Daytime Running
LightThe left or right-hand daytime running lamp is defective.XVisit a qualified specialist workshop.Display messages225On-board computer and displaysZ

Display messagesPossible causes/consequences and M Solutions¨
Pull Over Car Too
LowYou have pulled away while the vehicle level is still too low.
AIRMATIC sets the vehicle to the selected level after a short
period.XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XEngage the parking brake.XWait until the display message disappears before pulling away.GRisk of accident
AIRMATIC is defective. A warning tone also sounds.
XDo not drive faster than 50 mph (80 km/h).XMake only slight steering movements. Otherwise, the front
fender or the tires could be damaged if the steering movement
is too large.XListen for scraping sounds.XPull 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.XVisit a qualified specialist workshop.¨
MalfunctionGRisk of accident
The AIRMATIC function is restricted. The vehicle's handling
characteristics may be affected.
XDo not drive faster than 50 mph (80 km/h).XVisit a qualified specialist workshop.HOLD
OffThe HOLD function is deactivated. The vehicle is skidding.
A warning tone also sounds.XReactivate the HOLD function later ( Y page 166).Radar Sensors
Deactivated See
Operator's ManualThe radar sensor system is deactivated.XSwitch on the radar sensor system ( Y page 211).230Display messagesOn-board computer and displays

Display messagesPossible causes/consequences and M SolutionsBlind Spot Assist
Inoperative or
Active Blind Spot
Assist InoperativeBlind Spot Assist or Active Blind Spot Assist is defective.
The yellow 9 indicator lamps also light up in the exterior
mirrors.XVisit a qualified specialist workshop.Park Assist
CanceledThe driver's door is open and the driver's seat belt has not been
fastened.XRepeat the parking process with the seat belt fastened and the
driver's door closed.You have inadvertently touched the multifunction steering wheel
while steering intervention was active.XWhile steering intervention is active, make sure that the
multifunction steering wheel is not touched.The vehicle has started to skid and ESP ®
has intervened.XUse Active Parking Assist again later ( Y page 175).Park Assist
InoperativeYou have just performed a large number of turning or parking
maneuvers.
Active Parking Assist will become available again after
approximately 10 minutes ( Y page 175).XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XSwitch off and restart the engine.XIf the warning message does not disappear: consult a qualified
specialist workshop.PARKTRONIC is defective.XVisit a qualified specialist workshop.Park Assist
FinishedThe vehicle is parked. A warning tone also sounds.
The display message disappears automatically.DISTRONIC PLUS
OffDISTRONIC PLUS has been deactivated ( Y page 157). If it was
deactivated automatically, a warning tone also sounds.DISTRONIC PLUS
Now AvailableDISTRONIC PLUS is operational again after having been
temporarily unavailable. You can now reactivate DISTRONIC PLUS
( Y page 157).232Display messagesOn-board computer and displays

Display messagesPossible causes/consequences and M Solutionsh
Check Tire PressureGRisk of accident
The tire pressure in one or more tires has dropped significantly.
XStop the vehicle without making any sudden steering or braking
maneuvers. Pay attention to the traffic conditions as you do so.XIf necessary, change a wheel ( Y page 338).XCheck the tire pressure. If necessary, correct the tire pressure
( Y page 322).h
Correct Tire
PressureThe tire pressure is too low in at least one of the tires or the tire
pressure difference between the wheels is too great.XCheck the tire pressures at the next opportunity. If necessary,
correct the tire pressure ( Y page 322).
Vehicle
Display messagesPossible causes/consequences and M SolutionsShift to 'P' or 'N'
to Start EngineYou have attempted to start the engine with the transmission in
position R or D.XShift the transmission to position P or N.Auxiliary Battery
MalfunctionThe auxiliary battery for the automatic transmission is no longer
being charged.XVisit a qualified specialist workshop.Apply Brake to
Shift from 'P' You have attempted to move the transmission selector lever to
position D, R or N without depressing the brake pedal.XDepress the brake pedal.Door Open
Vehicle Not in 'P'The driver's door is open and the transmission is in position R, N
or D.
A warning tone also sounds.XShift the transmission to position P.XEngage the parking brake.Display messages237On-board computer and displaysZ

Display messagesPossible causes/consequences and M SolutionsService Required
Do Not Shift Gears
Visit DealerYou cannot change the transmission position due to a malfunction.
A warning tone also sounds.
If transmission position D is selected:XDrive to a qualified specialist workshop without shifting the
transmission from position D.
If transmission position R, N or P is selected:
XNotify a qualified specialist workshop or breakdown service.Only Shift to 'P'
when Vehicle is
StationaryThe vehicle is moving.XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XShift the transmission to position P.NThe trunk lid is open.XClose the trunk lid.MGRisk of accident
The hood is open.
XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XEngage the parking brake.XClose the hood.CAt least one door is open.XClose all the doors._
Rear Left Backrest
Not Latched or Rear
Right Backrest Not
LatchedGRisk of injury
The backrest in the rear is not engaged on the left-hand and/or
right-hand side.
XPush the backrest back until it engages._
Lock Seat Backrest
Front Left or Lock
Seat Backrest
Front RightThe driver's or front passenger's seat backrest is not engaged. A
warning tone also sounds.XPush the backrest back until it engages.238Display messagesOn-board computer and displays

Display messagesPossible causes/consequences and M SolutionsÂ
Key Not Detected
(Red display message)The KEYLESS-GO key is not in the vehicle.
A warning tone also sounds.
If the engine is switched off, you can no longer lock the vehicle
centrally or start the engine.XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XEngage the parking brake.XLocate the KEYLESS-GO key.The KEYLESS-GO key is not detected while the engine is running
because there is interference from a strong source of radio waves.
A warning tone also sounds.XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XEngage the parking brake.XOperate the vehicle with the SmartKey in the ignition lock.Â
Key Not Detected
(White display
message)The KEYLESS-GO key cannot be detected at present.XChange the location of the key with the KEYLESS-GO functions
in the vehicle.
If the KEYLESS-GO key is still not detected:
XChange the location of the key with the KEYLESS-GO functions
in the vehicle.XOperate the vehicle with the SmartKey in the ignition lock.Â
Key still in
vehicleThe KEYLESS-GO key has been detected inside the vehicle during
locking.XRemove the KEYLESS-GO key from the vehicle.Â
Remove 'Start'
Button and Insert
KeyKEYLESS-GO is temporarily malfunctioning or is defective. A
warning tone also sounds.XInsert the SmartKey into the ignition lock and turn it to the
desired position.XVisit a qualified specialist workshop.Â
Close Doors to
Lock VehicleAt least one door is open. A warning tone also sounds.XClose all doors and lock the vehicle again.240Display messagesOn-board computer and displays

Safety systemsProblemPossible causes/consequences and M Solutions$ (USA only)
J (Canada only)
The red brake system
warning lamp comes on
while the engine is
running. A warning tone
also sounds.GRisk of accident
The brake boosting effect is malfunctioning and the braking
characteristics may be affected.
XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.XEngage the parking brake.XConsult a qualified specialist workshop.XObserve the additional display messages in the multifunction
display.$ (USA only)
J (Canada only)
The red brake system
warning lamp comes on
while the engine is
running. A warning tone
also sounds.GRisk of accident
There is not enough brake fluid in the brake fluid reservoir.
XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.XEngage the parking brake.XConsult a qualified specialist workshop immediately.XObserve the additional display messages in the multifunction
display.
Do not add brake fluid. This will not correct the malfunction.
GWARNING
Driving with the brake warning lamp illuminated can result in an accident. Have your brake system
checked immediately if the brake warning lamp stays on. Do not add brake fluid before checking
the brake system.
Overfilling the brake fluid reservoir can result in spilling brake fluid on hot engine parts and the
brake fluid catching fire. You can be seriously burned.
Warning and indicator lamps in the instrument cluster243On-board computer and displaysZ