brake MERCEDES-BENZ GLA SUV 2018 Manual Online

Display messagesPossible causes/consequences andMSolutions
b
Check LeftBrakeLam porCheck RightBrake Lam p
The leftor right-hand brak elamp is defective.
XChec kwhether you are permitte dto replace th ebulb yourself
(Ypage 105).
or
XVisit aqualified specialist workshop .
b
CheckLeftHighBeamor Check RightHighBea m
The lef tor right-hand high beam is defective.
XChec kwhether you are permitte dto replace th ebulb yourself
(Ypage 105).
or
XVisit aqualified specialist workshop .
b
LicensePlate Lam p
The leftor right-hand license plat elamp is faulty.
XVisit aqualified specialist workshop .
b
Check LeftFog Lam porCheck Right FogLam p
The lef tor right-hand fog lamp is faulty.
XVisit aqualified specialist workshop .
b
RearFog Lam p
The rear fog lamp is faulty.
XCheckwhether you are permitte dto replace th ebulb yourself
(Ypage 105).
or
XVisit aqualified specialist workshop .
b
Check Front LeftParkingLam por
Check Front Right
Parkin 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 105).
or
XVisit aqualified specialist workshop .
b
Backup Light
The backup lamp is defective.
XCheckwhether you are permitte dto replace th ebulb yourself
(Ypage 105).
or
XVisit aqualified specialist workshop .
b
Check LeftTai lLamporCheck RightTai lLam p
The lef tor right-hand tai llamp is defective.
XVisit aqualified specialist workshop .
212Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
TirePress.Sen ‐sor(s) Missin gUSAonly:
There is no signal from th etire pressur esensor of on eor several tires .
The pressur eof th eaffecte dtire does no tappear in th emultifunction
display.
XHav eth efault ytire pressur esensor replace dat aqualified special -
ist workshop .
TirePressure Moni‐tor Inoperative NoWheel Sensor s
USAonly:
The wheels mounte ddo no thav e a suitable tire pressur esensor .The
tire pressur emonitor is deactivated.
XMoun twheels wit hsuitable tire pressur esensors.
The tire pressur emonitor is activated automatically after drivin gfor
a few minutes.
Tir ePress.Monito rInoperativeUSAonly:
The tire pressur emonitor is faulty.
XVisit aqualified specialist workshop .
Vehicle
Display messagesPossible causes/consequences and MSolutions
DepressBrake toStart EngineYou hav eattempte dto start th eengin ewit hth etransmission in posi-
tion iwithout depressing th ebrak epedal .
XDepress th ebrak epedal .
ToDeselectPorN,Depres sBrake andStart Engine
You hav eattempte dto shift th etransmission to position korh
without starting th eengine.
XStart th eengine.
XDepress th ebrak epedal .
iIt is only possibl eto shift th etransmission from position Pto th e
desire dposition if you depress th ebrak epedal .Only then can th e
parking loc kbe deactivated. If you do no tdepress th ebrak epedal ,
th eDIRECT SELECT lever can still be moved but th eparking loc k
remain sengaged.
iAt transmission fluid temperatures belo wÒ4 ‡ ( Ò20†) you can
only shift out of position Pint oanother transmission position when
th eengin eis running.
Apply Brake toShift fro m'P'You attempte dto shift th etransmission to position k,iorh
without depressing th ebrak epedal .
XDepress th ebrak epedal .
222Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
TransmissionNotinPRis kof Vehicl eRollingAwa y
The driver's door is open or no tfully closed and th etransmission is in
position k,iorh.
A warning tone also sounds.
GWARNIN G
The vehicl emay rol laway.
There is aris kof an accident.
XShift th etransmission to position j.
XSecureth evehicl eagainst rollin gaway (Ypage 143).
XCloseth edriver's door completely.
Servic eRequiredDoNot Shift GearsVisit Dealer
You canno tchang eth etransmission position due to amalfunction .
A warning tone also sounds.
If transmission position his selected:
XDrive to aqualified specialist workshop without shifting th etrans -
mission from position h.
If position k,iorj is selected:
XSecur eth evehicl eagainst rollin gaway (Ypage 143).
XNotify aqualified specialist workshop or breakdown service.
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 j.
To Engage Trans‐miss. PositionRFirst DepresstheBrake
You hav eattempte dto shift from position hori to position k.
XShift thetransmission to position kwithth ebrak epedal
depressed.
ReversingNotPossi‐bleServic eRequiredThe automatic transmission is malfunctioning .You canno tbac kup.
XVisit aqualified specialist workshop .
Transmission Mal‐functionThe automatic transmission is malfunctioning .
XVisitaqualified specialist workshop .
Transmission Mal‐function StopThe automatic transmission is malfunctioning .
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 143).
XConsult aqualified specialist workshop .
Display messages223
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
StopVehicl eShiftto PLeave EngineRunnin g
The automatic transmission has overheated.
XDrive on carefully.
The automatic transmission is available again when th edisplay
message goe sout .
If th emultifunction display still shows th edisplay message :
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 143).
XWait until th eautomatic transmission has cooled down and th edis-
play message has disappeared.
Auxiliary Batter yMalfunctionThe auxiliary battery for th eautomatic transmission is no longer bein g
charged.
XVisit aqualified specialist workshop .
XUntilthen ,always shift th etransmission to position jbefore you
switch off th eengine.
XBefor eleaving th evehicle, apply th eelectric parking brake.
Trans. Oil Overhea‐ted Drive on wit hCare
Mercedes-AMG vehicles: th etransmission oil has overheated.
Manual drive progra mM and th etemporarily active manual drive pro -
gra mare no longer available. The engin epowe routput is reduced.
XAllow th evehicl eto cool down .
4matic CurrentlyUnavailable4MATIC has overheated. The vehicl eis only driven by th efron twheels.
XDrive on .
The airflow cools 4MATIC mor equickly.
Whe nth edisplay message goe sout ,4MATIC is available again and
th evehicl eis driven by all fou rwheels.
4matic Inoperative4MATIC is malfunctioning .The vehicl eis only driven by th efron t
wheels.
XVisit aqualified specialist workshop .
AThe 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.
224Display messages
On-board computer and displays

Safety systems
Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
éNThe yellow brake system warning lamp lights up while the engine is running.
The brake system is malfunctioning.
GWARNING
The braking characteristics may be affected.
There is a risk of an accident.
XDrive on taking extra care.
XVisit a qualified specialist workshop immediately.
$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 143).
XConsult a qualified specialist workshop.
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 143).
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.
Warning and indicator lamps in the instrument cluster229
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 deactivated due to a malfunction. Therefore,
BAS (Brake Assist), Active Brake Assist, ESP
®(Electronic Stability Program), the
HOLD function and hill start assist, for example, are also deactivated.
ATTENTION ASSIST is deactivated.
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 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.
!N The yellow ABS warning lamp is lit while the engine is running.
ABS is temporarily unavailable. Therefore, BAS, Active Brake Assist, ESP®, EBD
(electronic brake force distribution), the HOLD function and hill start assist, for
example, are also deactivated.
Possible causes are:
Rself-diagnosis is not yet complete
Rthe on-board voltage may be insufficient
ATTENTION ASSIST is deactivated.
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 a risk of an accident.
XCarefully drive a suitable distance, making slight steering movements at a speed
above 12 mph (20 km/h).
The functions mentioned above are available again when the warning lamp goes
out.
If the warning lamp is still on:
XObserve the additional display messages in the multifunction display.
XDrive on carefully.
XVisit a qualified specialist workshop immediately.
230Warning and indicator lamps in the instrument cluster
On-board computer and displays

Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
!NThe yellow ABS warning lamp is lit while the engine is running. A warning tone
also sounds.
EBD is malfunctioning. Therefore, ABS, BAS, Active Brake Assist, ESP
®, the HOLD
function and hill start assist, for example, are not available either.
ATTENTION ASSIST is deactivated.
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.
!
֌
$JN $(USA only), J(Canada only): the red brake warning lamp and the yellow
ABS, ESP®and ESP®OFF warning lamps are lit while the engine is running.
ABS and ESP®are malfunctioning. Therefore, BAS, Active Brake Assist, EBD, the
HOLD function and hill start assist, for example, are not available either.
ATTENTION ASSIST is deactivated.
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.
Warning and indicator lamps in the instrument cluster231
On-board computer and displays
Z

Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
÷åNThe yellow ESP®and ESP®OFF warning lamps are lit while the engine is running.
ESP®, BAS, Active Brake Assist, the HOLD function and hill start assist are not
available due to a malfunction.
ATTENTION ASSIST is deactivated.
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 display.
XDrive on carefully.
XVisit a qualified specialist workshop immediately.
÷åN The yellow ESP®and ESP®OFF warning lamps are lit while the engine is running.
ESP®, BAS, the HOLD function and hill start assist are temporarily unavailable.
Active Brake Assist may have also failed.
ATTENTION ASSIST is deactivated.
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 movements at a speed
above 12 mph (20 km/h).
The functions mentioned above are available again when the warning lamp goes
out.
If the warning lamp is still on:
XObserve the additional display messages in the multifunction display.
XDrive on carefully.
XVisit a qualified specialist workshop immediately.
Warning and indicator lamps in the instrument cluster233
On-board computer and displays
Z

Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
!FNF (USA only), !(Canada only): the red indicator lamp for the electric
parking brake flashes or lights up and/or the yellow warning lamp for the electric
parking brake lights up.
XObserve the additional display messages in the multifunction display.
6N The red restraint system warning lamp is lit while the engine is running.
The restraint system is malfunctioning.
GWARNING
The air bags or Emergency Tensioning Devices may either be triggered uninten-
tionally or, in the event of an accident, may not be triggered.
There is an increased risk of injury.
XObserve the additional display messages in the multifunction display.
XDrive on carefully.
XContact a qualified specialist workshop and have the restraint system checked.
For further information about the restraint system, see (
Ypage 39).
Engine
Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
;NThe yellow Check Engine warning lamp lights up while the engine is running.
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.
XVisit a qualified specialist workshop immediately.
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.
æN The yellow reserve fuel warning lamp lights up while the engine is running.
The fuel level has dropped into the reserve range.
XRefuel at the nearest gas station.
234Warning and indicator lamps in the instrument cluster
On-board computer and displays

Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
XAt coolant temperatures below 248 ‡ (120 †), drive to the nearest qualified
specialist workshop.
XAvoid heavy loads on the engine as you do so, e.g. driving in mountainous terrain
and stop-and-go traffic.
Driving systems
Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
·NThe red distance warning lamp lights up while the vehicle is in motion. A warning
tone also sounds.
You are approaching a vehicle or a stationary obstacle in your line of travel at too high a speed.
XBe prepared to brake immediately.
XPay careful attention to the traffic situation. You may have to brake or take
evasive action.
Further information on the distance warning function of Active Brake Assist
(
Ypage 61).
Warning and indicator lamps in the instrument cluster237
On-board computer and displays
Z