Display messagesPossible causes/consequences andMSolutions
DISTRONIC PLUSOffDISTRONI CPLU Shas been deactivated (Ypage 128).
If it was no tdeactivated by th edriver , awarning tone also sounds.
DISTRONIC PLU SNowAvailableDISTRONI CPLU Sis operational again after having been temporarily
unavailable .You can no wreactivat eDISTRONI CPLU S (Ypage 128).
DISTRONIC PLU SCur ‐rently UnavailableSee Operator' sMan ‐ual
DISTRONI CPLU Sis temporarily inoperative.
Possibl ecauses are:
Rth eradar sensor system is temporarily inoperative, e.g. due to elec -
tromagneti cradiation emitted by nearby TV or radi ostation sor
other source sof electromagneti cradiation .
Rthesystem is outside th eoperating temperature range.
Rth eon-boar dvoltag eis to olow.
A warning tone also sounds.
Whe nth ecauses state dabov eno longer apply, th edisplay message
disappears.
DISTRONI CPLU Sis operational again .
If th edisplay message does no tdisappear :
XPull overand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 119).
XRestart th eengine.
DISTRONICPLU SInop‐erativ eDISTRONI CPLU Sis defective.
A warning tone also sounds.
XVisit aqualified specialist workshop .
DISTRONIC PLUSSus ‐pendedYou hav edepressed th eaccelerato rpedal .DISTRONI CPLU Sis no
longer controllin gth espeed of th evehicle.
XRemove your foo tfrom th eaccelerato rpedal .
DISTRONIC PLU S- - -mphAn activation condition for DISTRONI CPLU Sis no tfulfilled .
XCheckth eactivation condition sfor DISTRONI CPLU S (Ypage 128).
DISTRONIC PLU SandSPEEDTRONIC Inoper ‐ative
DISTRONICPLU Sand SPEEDTRONI Care faulty. Awarning tone also
sounds.
XVisit aqualified specialist workshop .
CruiseControlInop‐erativeCruisecontrol is malfunctioning .
A warning tone also sounds.
XVisit aqualified specialist workshop .
182Display messages
On-board computer and displays
Vehicle
Display messagesPossible causes/consequences andMSolutions
Shiftto'P'or'N'to Start EngineYou have attempted to start the engine with the transmission in posi-
tionRor D.
XShift the selector lever to position Por N.
Apply Brake toShift from 'P'You have attempted to shift the selector lever to position D,R or N
without depressing the brake pedal.
XDepress the brake pedal.
ToDeselectPorN,Depress Brake andStart Engine
With the engine switched off, you have attempted to shift the selector
lever out of position Por Ninto another transmission position.
XDepress the brake pedal.
XStart the engine.
TransmissionNotinP Risk of VehicleRolling Away
The driver's door is open or not fully closed and the transmission is in
position R,Nor D.
A warning tone also sounds.
GWARNING
The vehicle may roll away.
There is a risk of an accident.
XShift the transmission to position P.
XSecure the vehicle against rolling away (Ypage 119).
XClose the driver's door completely.
Only Shift to 'P'whenVehicleisSta‐tionary
The 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 positionP.
ServiceRequiredDoNot Shift GearsVisit Dealer
You cannot change the transmission position due to a malfunction.
A warning tone also sounds.
If transmission positionDis selected:
XDrive to a qualified specialist workshop without shifting the trans-
mission from position D.
If transmission position R,Nor Pis selected:
XSecure the vehicle against rolling away (Ypage 273).
XNotify a qualified specialist workshop or breakdown service.
ReversingNotPossi‐bleServiceRequiredThe sub geartrain with the even gears has failed. You can no longer
engage reverse gear. The smoothness of the gear change is restricted.
The transmission is in emergency mode.
A warning tone also sounds.
XVisit a qualified specialist workshop.
Display messages185
On-board computer and displays
Z
Display messagesPossible causes/consequences andMSolutions
Transmission Mal‐function StopAmalfunction has occurred in th emechanical transmission compo -
nents.
A warning tone also sounds. The gearbox automatically shift sto posi-
tion N.
XPull ove rand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XShift th eselector lever to position P.
XSecureth evehicl eagainst rollin gaway (Ypage 119).
XNotify aqualified specialist workshop or breakdown service.
Depres sBrake toStart EngineYou canno tstart th eengine. The engin ewas switched off in position D
or R.
XDepress th ebrak epedal and start th eengine.
Onl yShift to 'P'whe nVehicl eisSta‐tionar y
The vehicl eis moving .
XPull overand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XShift th etransmission to position P.
j
ParkingLoc kMal ‐funct. Apply Park‐ing Brake
Transmission position Pcanno tbe selected.
XMak esur ethat th eelectric parking brak eis applied.
XPreven tth evehicl efrom rollin gaway before you leav eit
(Ypage 273).
XVisit aqualified specialist workshop .
d
Transmission OilCoolingMalfunction
The transmission coolan tpump is faulty. The transmission may over-
heat .
XIn th eon-boar dcomputer, select th eAMGmen uand chec kth e
transmission oil temperature (Ypage 162).
XAvoid excessive loading,e.g. due to dynamic driving.
XIf th etransmission oil temperature is less than 24 8‡( 120 †), you
can continue driving to the nearest qualified specialist workshop.
d
Trans. Oil Overhea‐ted Drive on withCare
The transmission oil has overheated.
Manual mode Mand temporary manual drive program are no longer
available. Only the Comfort setting is available for the transmission.
The engine output is reduced according to the degree of overheating.
XAllow the transmission oil to cool by adopting a defensive driving
style.
Electronic RearAxle DifferentialLock Inoperative
The electronic rear axle differential lock is inoperative.
XVisit a qualified specialist workshop.
Electronic RearAxle DifferentialLock CurrentlyUnavailable
The electronic rear axle differential lock motor has overheated.
XAllow electronic rear axle differential lock to cool by adopting a
defensive driving style.
186Display messages
On-board computer and displays
Display messagesPossible causes/consequences andMSolutions
NThe tailgateis open .
GWARNIN G
Whe nth eengin eis running, exhaust gase scan ente rth evehicl einte-
rio rif th etailgat eis open .
There is aris kof poisoning .
XCloseth etailgate.
MThe hoo dis open . Awarning tone also sounds.
GWARNIN G
The open hoo dmay bloc kyour vie wwhen th evehicl eis in motion .
There is aris kof an accident.
XPull ove rand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 119).
XCloseth ehood.
CAt least on edoor is open . Awarning tone also sounds.
XClos eall th edoors.
Rea rSpoile rCon ‐trolSystem Inoper ‐ative
The rear spoiler canno tbe full yretracte dand may extend again .
If th eretraction of th erear spoiler is blocked, e.g. by ice :
XMakesur ethat th ecaus eof th ebloc kis eliminated.
XSwitc hoff th eengin eand loc kth evehicle.
XStart th evehicl eafter waiting afew minutes.
The rear spoiler return sto th eoriginal position .
If this problem persists or th ecaus ecanno tbe identified:
XVisit aqualified specialist workshop .
RearSpoile rInoper‐ative Limit 125 mphThe rear spoiler canno tbe full yextended and extend sas far as pos -
sible.
The speed of th evehicl eis limite dto 12 5mph (20 0km/h ).
If the extension/retraction of the rear spoiler is blocked, e.g. by ice:
XMake sure that the cause of the block is eliminated.
XSwitch off the engine and lock the vehicle.
XStart the vehicle after waiting a few minutes.
The rear spoiler returns to the original position.
If this problem persists or the cause cannot be identified:
XVisit a qualified specialist workshop.
Display messages187
On-board computer and displays
Z
Display messagesPossible causes/consequences andMSolutions
Â
Key Not Detected(whitedisplay message )
The SmartKey is currentl yundetected.
XChange th elocation of th eSmartKey in th evehicle.
If th eSmartKey still canno tbe detected:
XInser tth eSmartKey int oth eignition loc kand tur nit to th edesire d
position .
Â
Key Not Detected(reddisplay message )
The SmartKey is no tin th evehicle.
A warning tone also sounds.
If th eengin eis switched off ,you can no longer loc kth evehicl ecen-
trally or start th eengine.
XPull ove rand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 119).
XLocate th eSmartKey.
XPress aon thesteering whee lto confirm th edisplay message .
Becausethere is interferenc efrom astron gsource of radi owaves, th e
SmartKey is no tdetecte dwhils tth eengin eis running.
A warning tone also sounds.
XPull ove rand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 119).
XInsertth eSmartKey int oth eignition loc kand bring int oke ymode.
Â
Insert Key
The SmartKey is continually undetected.
The SmartKey detection function has atemporar ymalfunction or is
faulty. Awarning tone also sounds.
XInser tth eSmartKey int oth eignition loc kand tur nit to th edesire d
position .
XVisitaqualified specialist workshop .
Warning and indicat orlamps in the instrume nt cluster
General notes
Some systems carry out aself-diagnosis when th eignition is switched on .Therefore ,som eindicator
and warning lamp smay ligh tup or flas htemporarily. This behavio ris non-critical .These indicator
and warning lamp sonly indicat e amalfunction if they ligh tup or flas hafter starting th eengin eor
whils tdriving.
Warning and indicator lamps in the instrument cluster189
On-board computer and displays
Z
Safety
Seat belts
Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
üNAfter starting the engine, the red seat belt warning lamp lights up for 6 seconds.
The seat belt warning lamp reminds the driver and front passenger to fasten their
seat belts.
XFasten your seat belt (Ypage 39).
üN After starting the engine, the red seat belt warning lamp lights up. In addition, a
warning tone sounds for up to 6 seconds.
The driver's seat belt is not fastened.
XFasten your seat belt (Ypage 39).
The warning tone ceases.
üN The red seat belt warning lamp lights up after the engine starts, as soon as the
driver's or the front-passenger door is closed.
The driver or front passenger has not fastened their seat belt.
XFasten your seat belt (Ypage 39).
The warning lamp goes out.
There are objects on the front-passenger seat.
XRemove the objects from the front-passenger seat and stow them in a secure
place.
The warning lamp goes out.
üN The red seat belt warning lamp flashes and an intermittent audible warning
sounds.
The driver or front passenger has not fastened their seat belt. The vehicle is being driven faster than 15 mph (25 km/h) or has briefly been driven faster than 15 mph
(25 km/h).
XFasten your seat belt (Ypage 39).
The warning lamp goes out and the intermittent warning tone ceases.
There are objects on the front-passenger seat. The vehicle is being driven faster
than 15 mph (25 km/h) or has briefly been driven faster than 15 mph (25 km/h).
XRemove the objects from the front-passenger seat and stow them in a secure
place.
The warning lamp goes out and the intermittent warning tone ceases.
190Warning and indicator lamps in the instrument cluster
On-board computer and displays
Safety systems
Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
$JN$ (USA only), J(Canada only): the red brake system warning lamp is lit
while the engine is running. A warning tone also sounds.
GWARNING
The brake boosting effect is malfunctioning and the braking characteristics may be
affected.
There is a risk of an accident.
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.
XSecure the vehicle against rolling away (Ypage 119).
XVisit a qualified specialist workshop immediately.
XObserve the additional display messages in the multifunction display.
$JN $ (USA only), J(Canada only): the red brake system warning lamp is lit
while the engine is running. A warning tone also sounds.
There is not enough brake fluid in the brake fluid reservoir.
GWARNING
The braking effect may be impaired.
There is a risk of an accident.
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.
XSecure the vehicle against rolling away (Ypage 119).
XDo not add brake fluid. Adding more will not correct the malfunction.
XConsult a qualified specialist workshop.
XObserve the additional display messages in the multifunction display.
$N USA only: the red brake system warning lamp is lit while the engine is running.
The multifunction display also shows a display message with the #symbol.
The brake pads/linings have reached their wear limit.
XVisit a qualified specialist workshop.
Warning and indicator lamps in the instrument cluster191
On-board computer and displays
Z
Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
!NThe yellow ABS warning lamp is lit while the engine is running.
ABS (anti-lock braking system) is malfunctioning.
If there is an additional warning tone, the EBD (electronic brake force distribution)
is malfunctioning.
Other driving systems and driving safety systems may also be faulty.
GWARNING
The brake system continues to function normally, but without the functions listed
above. The front and rear wheels could therefore lock if you brake hard, for exam-
ple.
The steerability and braking characteristics may be severely affected. The braking
distance in an emergency braking situation can increase.
If ESP
®is not operational, ESP®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XObserve the additional display messages in the multifunction display.
XDrive on carefully.
XVisit a qualified specialist workshop immediately.
If the ABS control unit is faulty, there is also a possibility that other systems, such
as the navigation system or the automatic transmission, will not be available.
$J
֌
!N $ (USA only), J(Canada only): the red brake warning lamp and the yellow
ESP®and ABS warning lamps are lit while the engine is running.
ABS and ESP®are malfunctioning.
Other driving systems and driving safety systems may also be faulty.
GWARNING
The brake system continues to function normally, but without the functions listed
above. The front and rear wheels could therefore lock if you brake hard, for exam-
ple.
The steerability and braking characteristics may be severely affected. The braking
distance in an emergency braking situation can increase.
If ESP
®is not operational, ESP®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XObserve the additional display messages in the multifunction display.
XDrive on carefully.
XVisit a qualified specialist workshop immediately.
192Warning and indicator lamps in the instrument cluster
On-board computer and displays