Display messagesPossible causes/consequences andMSolutions
b
Front LeftParkin gLamporFront RightParkin gLam p
The fron tlef tor fron tright parking or standing lamp is defective.
XChec kwhether you are permitte dto replace th ebulb yourself
(Ypage 93) .
or
XVisit aqualified specialist workshop .
b
Backup Light
The backup lamp is defective.
XReplaceth ebulb (Ypage 92).
b
Check Front Lef tSidemarkerLam por
Check Front Right
Sidemarke rLam p
The lef tor right fron tside marke rlamp is defective.
XChec kwhether you are permitte dto replace th ebulb yourself
(Ypage 93) .
or
XVisit aqualified specialist workshop .
b
Check LeftTai lLamporCheck RightTai lLam p
The lef tor right-hand tai llamp is defective.
XChec kwhether you are permitte dto replace th ebulb yourself
(Ypage 93) .
or
XVisit aqualified specialist workshop .
b
Check LeftDaytim eRunningLightorChec kRightDaytim eRunnin gLight
The leftor right-hand daytime runnin glamp is defective.
XVisit aqualified specialist workshop .
b
Malfunction SeeOperator'sManual
The exterio rlighting is defective.
XVisit aqualified specialist workshop .
b
AutoLam pFunctionInoperative
The ligh tsensor is defective.
XVisit aqualified specialist workshop .
b
Switch Off Lights
The lights are still switched on when you leav eth evehicle. Awarning
tone also sounds.
XTurn th eligh tswitch to Ã.
Display messages191
On-board computer and displays
Z
Display messagesPossible causes/consequences andMSolutions
TC NEUTRAL
ON
The transfer cas eis in th eNeutral neutral position .
A warning tone will also soun dwhen th edriver's door is opened and
th ebrak epedal is no tdepressed.
XClos eth edriver's door .
XSecureth evehicl eagainst rollin gaway (Ypage 130).
XShift th etransfer cas eaccording to drivin gcondition s
(Ypage 162).
Preselected differ ‐ential lock
ESP unavailable
Adifferential loc khas been engaged. The differential gear has no tyet
locke dth erespective differential. The activation indicator lamp (yel-
low) (
Ypage 164) of th eswitch lights up.
ES Pis unavailable .
AB Sis still available.
Differential loc kactive
ABSandESPunavail‐able
Adifferential loc kwas engage dand th edifferential gear has locke d
th erespective differential. The activation indicator lamp (yellow) and
function indicator lamp (red) (
Ypage 164) on theswitch ligh tup.
AB Sand ES Pare unavailable .
Blind SpotAssistcurrently unavaila‐ble
See Operator' sMan ‐ual
Blind Spot Assis tis temporarily inoperative. Possibl ecauses are:
Ryou hav eestablished th eelectrical connection between th etrailer
and your vehicle.
Rth esensor sare dirty.
Rfunction is impaire ddue to heav yrain or snow.
Rth eradar sensor system is outside th eoperating temperature
range.
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 .
The yellow 9indicator lamp salso ligh tup in th eexterio rmirrors.
XWhe ntowin g atrailer ,confirm th edisplay message wit ha.
If you are drivin gwithout atrailer and th edisplay message does no t
disappear :
XPull overand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XApply th eparking brake.
XClean th esensor s (Ypage 244).
XRestart th eengine.
If th esystem detects that th esensor sare fully operational, th edisplay
message disappears.
Blind Spot Assis tis operational again .
Blind SpotAssistor
InoperativeBlind Spot Assis tis defective.
The yellow 9indicator lamp salso ligh tup in th eexterio rmirrors.
XVisit aqualified specialist workshop .
196Display messages
On-board computer and displays
Safety
Seat belts
ProblemPossible causes/consequences and MSolutions
ü
After starting the engine,
the red seat belt warning
lamp lights up for six sec-
onds.The seat belt warning lamp reminds the driver and front passenger to
fasten their seat belts.
XFasten your seat belt (Ypage 38).
ü
After starting the engine,
the red seat belt warning
lamp lights up. In addi-
tion, a warning tone
sounds for up to six sec-
onds.The driver's seat belt is not fastened.
XFasten your seat belt (Ypage 38).
The warning tone ceases.
ü
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 38).
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.
ü
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 38).
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.
204Warning and indicator lamps in the instrument cluster
On-board computer and displays
ProblemPossible causes/consequences andMSolutions
!
The yellow ABS warning
lamp is lit while the
engine is running.ABS (Anti-lock Braking System) is deactivated due to a malfunction.
Other driving systems and driving safety systems may also be mal-
functioning.
GWARNING
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 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 dis-
play.
XDrive on carefully.
XVisit a qualified specialist workshop.
If the ABS control unit is faulty, there is also a possibility that other
systems, such as the navigation system or the automatic transmis-
sion, will not be available.
!
The yellow ABS warning
lamp is lit while the
engine is running.ABS is temporarily unavailable. BAS, ESP®, EBD (electronic brake
force distribution), the HOLD function, hill start assist, ESP®trailer
stabilization and the adaptive brake lights, for example, have also
been deactivated.
Possible causes are:
Rself-diagnosis is not yet complete.
Rthe on-board voltage may be insufficient.
GWARNING
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 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 a risk of an accident.
XCarefully drive a suitable distance, making slight steering move-
ments at a speed above 12 mph (20 km/h).
The functions mentioned above are available again when the warn-
ing lamp goes out.
If the warning lamp is still on:
XObserve the additional display messages in the multifunction dis-
play.
XDrive on carefully.
XVisit a qualified specialist workshop.
206Warning and indicator lamps in the instrument cluster
On-board computer and displays
ProblemPossible causes/consequences andMSolutions
!
The yellow ABS warning
lamp is lit while the
engine is running. A
warning tone also
sounds.EBD is malfunctioning. Therefore, ABS, BAS, ESP®, the HOLD function,
hill start assist, adaptive brake lights and ESP®trailer stabilization, for
example, are also unavailable.
GWARNING
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 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 dis-
play.
XDrive on carefully.
XVisit a qualified specialist workshop.
!
The yellow ABS warning
lamp is lit while the
engine is running.You have engaged the differential locks. ABS is deactivated.
XDisengage the differential locks.
Subsequently ABS is reactivated.
$ (USA only)
J (Canada only)
÷!
The yellow brake warn-
ing lamp, the yellow
ESP
®warning lamp and
the yellow ABS warning
lamp are lit while the
engine is running.
ABS and ESP®are malfunctioning. BAS, EBD, the HOLD function, hill
start assist, the adaptive brake lights and ESP®trailer stabilization, for
example, are therefore unavailable.
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 example.
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 dis-
play.
XDrive on carefully.
XVisit a qualified specialist workshop.
Warning and indicator lamps in the instrument cluster207
On-board computer and displays
Z
ProblemPossible causes/consequences andMSolutions
÷
The yellow ESP®warning
lamp flashes while the
vehicle is in motion.
ESP®or traction control has intervened because there is a risk of
skidding or at least one wheel has started to spin.
Cruise control or DISTRONIC PLUS is deactivated.
XWhen pulling away, only depress the accelerator pedal as far as
necessary.
XEase off the accelerator pedal while the vehicle is in motion.
XAdapt your driving style to suit the road and weather conditions.
XDo not deactivate ESP®.
For exceptions, see: (
Ypage 57).
å
The yellow ESP®OFF
warning lamp is lit while
the engine is running.
ESP®is deactivated.
GWARNING
If ESP
®is switched off, ESP®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XReactivate ESP®.
For exceptions, see: (
Ypage 57).
XAdapt your driving style to suit the road and weather conditions.
If ESP
®cannot be activated:
XHave ESP®checked at a qualified specialist workshop.
֌
The yellow ESP®and
ESP®OFF warning lamps
are lit while the engine is
running.
ESP®, BAS, the HOLD function, hill start assist, the adaptive brake
lights and ESP®trailer stabilization are unavailable due to a malfunc-
tion.
GWARNING
The brake system continues to function normally, but without the
functions listed above.
The braking distance in an emergency braking situation can thus
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 dis-
play.
XDrive on carefully.
XVisit a qualified specialist workshop.
208Warning and indicator lamps in the instrument cluster
On-board computer and displays
ProblemPossible causes/consequences andMSolutions
֌
The yellow ESP®and
ESP®OFF warning lamps
are lit while the engine is
running.
ESP®, BAS, the HOLD function, hill start assist and ESP®trailer sta-
bilization are temporarily unavailable.
BAS and the adaptive brake lights may also have failed.
Self-diagnosis is not yet complete.
GWARNING
The brake system continues to function normally, but without the
functions listed above.
The braking distance in an emergency braking situation can thus
increase.
If ESP
®is not operational, ESP®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XCarefully drive a suitable distance, making slight steering move-
ments at a speed above 12 mph (20 km/h) .
The functions mentioned above are available again when the warn-
ing lamp goes out.
If the warning lamp is still on:
XObserve the additional display messages in the multifunction dis-
play.
XDrive on carefully.
XVisit a qualified specialist workshop.
å
The yellow ESP®OFF
warning lamp is lit while
the engine is running.
The differential lock is engaged. ABS, ESP®, 4ETS and BAS have been
deactivated.
XDisengage the differential lock.
ESP®, 4ETS and BAS are subsequently reactivated.
XObserve the additional display messages in the multifunction dis-
play.
(Canada only)
(USA only)
The red parking brake
warning lamp comes on
while the vehicle is mov-
ing. A warning tone also
sounds.You are driving with the parking brake applied.
XRelease the parking brake.
The warning lamp goes out and the warning tone ceases.
6
The red restraint system
warning lamp is lit while
the engine is running.The restraint system is faulty.
GWARNING
The air bags or Emergency Tensioning Devices may either be triggered
unintentionally or, in the event of an accident, may not be triggered.
There is an increased risk of injury.
XDrive on carefully.
XHave the restraint system checked at a qualified specialist work-
shop immediately.
For further information about the restraint system, see (
Ypage 34).
Warning and indicator lamps in the instrument cluster209
On-board computer and displays
Z
Engine
ProblemPossible causes/consequences andMSolutions
;
The yellow Check Engine
warning lamp lights up
while the engine is run-
ning.There may be a malfunction, for example:
Rin the engine management
Rin the fuel injection system
Rin the exhaust system
Rin the ignition system
Rin the fuel system
The emission limit values may be exceeded and the engine may be in
emergency mode.
XHave the vehicle checked as soon as possible at a qualified spe-
cialist workshop.
iIn some states, you must immediately visit a qualified specialist
workshop as soon as the yellow Check Engine warning lamp lights
up. This is due to the legal requirements in effect in these states. If
in doubt, check whether such legal regulations apply in the state in
which you are currently driving.
8
The yellow reserve fuel
warning lamp lights up
while the engine is run-
ning.The fuel level has dropped into the reserve range.
XRefuel at the nearest gas station.
8
The yellow reserve fuel
warning lamp flashes
while the vehicle is in
motion.
In addition, the ;
Check Engine warning
lamp may light up.The fuel system pressure is too low. The fuel filler cap is not closed
correctly or the fuel system is leaking.
XCheck that the fuel filler cap is correctly closed.
XIf the fuel filler cap is not correctly closed: close the fuel filler
cap.
XIf the fuel filler cap is closed: visit a qualified specialist workshop.
?
The red coolant warning
lamp lights up while the
engine is running and the
coolant temperature
gage is at the start of the
scale.The temperature sensor for the coolant temperature gage is defective.
The coolant temperature is no longer being monitored. There is a risk
of engine damage if the coolant temperature is too high.
XPull over and stop the vehicle safely and switch off the engine, pay-
ing attention to road and traffic conditions. Do not continue driving
under any circumstances.
XApply the parking brake.
XConsult a qualified specialist workshop.
210Warning and indicator lamps in the instrument cluster
On-board computer and displays