2017 MERCEDES-BENZ GLS-Class SUV ECU

Display messagesPossible causes/consequences andMSolutions
XVisitaqualified specialist workshop immediately.
Fo rfurther information about th eOccupant Classification System, see
(
Ypage 49).
Lights
i
Vehicles wit hLE Dbulbs in th eligh tclusters :
The display message for th ecorrespondin glamp only appear swhen all of th eLEDs in th elamp
hav efailed.
Display messagesPossible causes/consequences and MSolutions
b
Check LeftLowBea m(Example)
The bulb in question is malfunctioning .
XVisitaqualified specialist workshop .
or
XChec kwhether you are permitte dto replace th ebulb yourself
(Ypage 117).
b
Active HeadlampsInoperative
The active ligh tfunction is faulty.
XVisit aqualified specialist workshop .
b
Malfunction SeeOperator'sManual
The exterio rlighting is malfunctioning .
XVisitaqualified specialist workshop .
Vehicles withtrailer to whitch : afusemay hav eblown .
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 159).
XCheckth efuses (Ypage 343).
XIf necessary, replace th eblown fuse. Observ eth ewarning notes.
If th emultifunction display still shows th edisplay message :
XVisitaqualified specialist workshop .
b
Malfunction SeeOperator'sManual
The exterio rlighting is malfunctioning .
XVisitaqualified specialist workshop .
b
AutoLam pFunctionInoperative
The ligh tsensor is defective.
XVisit aqualified specialist workshop .
b
Switch Off Lights
You leaveth evehicl eand th elights are switched on . Awarning tone
also sounds.
XTurn th eligh tswitch to th eà position .
256Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
?
CoolantToo HotSto pVehicl eTur nEngine Off
The coolan tis to ohot .
A warning tone also sounds.
GWARNIN G
Do no tdrive when your engin eis overheated. This can caus esom e
fluids whic hmay hav eleaked int oth eengin ecompartmen tto catch
fire.
Steam from th eoverheate dengin ecan also caus eserious burn swhic h
can occur jus tby opening th ehood.
There is aris kof injury.
XPull ove rand stop th evehicl esafely and switch off th eengine, pay-
ing attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 159).
XWait until th eengin ehas cooled down .
XMakesur ethat th eair supply to th eengin eradiato ris no tblocked,
e.g. by snow, slus hor ice .
XDo no tstart th eengin eagain until th edisplay message goe sout and
th ecoolan ttemperature is belo w24 8 ‡ (120†). Otherwise ,th e
engin ecould be damaged.
XPay attention to th ecoolan ttemperature gauge .
If th etemperatur eincreases again:
XVisit aqualified specialist workshop immediately.
Under normal operating condition sand wit hth especified coolan t
level, th ecoolan ttemperature may ris eto 24 8 ‡(120†).
#
See Operator' sMan ‐ual
The battery is no tbein gcharged.
A warning tone also sounds.
Possibl ecauses are:
Radefective alternato r
Ratorn poly-V-belt
Ramalfunction in th eelectronics
!Do no tcontinu edriving. The engin ecould otherwise overheat.
XPull ove rand stop th evehicl esafely and switch off th eengine, pay-
ing attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 159).
XConsult aqualified specialist workshop .
258Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
#
StopVehicl eSeeOperator' sManual
The battery is no longer bein gcharged and th ebattery charg elevel is
to olow.
A warning tone also sounds.
XPull ove rand stop th evehicl esafely and switch off th eengine, pay-
ing attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 159).
XObserv eth einstruction sin th e# See Operator' sManualdisplay message .
XConsultaqualified specialist workshop .
4
CheckEngineOilAtNextRefueling
The engin eoil level has dropped to th eminimum level.
A warning tone also sounds.
!Avoid lon gjourneys wit hto olittl eengin eoil. The engin ewill oth-
erwise be damaged.
XChec kth eoil level when next refueling, at th elatest (Ypage 321).
XIf necessary, add engin eoil (Ypage 321).
If th eengin eoil need stoppin gup mor eoften:
XContac t aqualified specialist workshop and hav eth eengin e
checked.
Information on approve dengin eoils can be obtained from any quali-
fie dspecialist workshop or on th eInternet at http://bevo.mercedes -
benz.com.
4
Check Engine OilLevel (Ad d 1quart)
Mercedes-AMG vehicles: th eengin eoil level is to olow.
!Avoid lon gjourneys wit hto olittl eengin eoil. The engin ewill oth-
erwise be damaged.
XChec kth eoil level when next refueling, at th elatest (Ypage 321).
XIf necessary, add engin eoil (Ypage 321).
If th eengin eoil need stoppin gup mor eoften:
XContac t aqualified specialist workshop and hav eth eengin e
checked.
Information on approve dengin eoils can be obtained from any quali-
fie dspecialist workshop or on th eInternet at http://bevo.mercedes -
benz.com.
4
Engine Oil LevelLow Sto pVehicl eTurnEngine Off
Mercedes-AMG vehicles: th eengin eoil level is to olow.
There is aris kof engin edamage.
XPull ove rand stop th evehicl esafely and switch off th eengine, pay-
ing attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 159).
XCheckth eengin eoil level (Ypage 321).
XIf necessary, add engin eoil (Ypage 321).
8
Fue lLevel Low
The fuel level has dropped int oth ereserv erange.
XRefue lat th eneares tgas station .
Display messages259
On-board computer and displays
Z

Drivingsystems
Display messagesPossible causes/consequences an dMSolutions
À
Attention Assist :Take a Break!
Based on certain criteria, ATTENTION ASSIST has detecte dfatigue or
a lac kof concentration on th epar tof th edriver . Awarnin gtone also
sounds.
XIf necessary, take abreak .
Durin glon gjourneys, take regular break sin goo dtime so you get
enough rest.
À
Attention AssistInoperative
ATTENTION ASSIST is inoperative .
XVisitaqualified specialis tworkshop .
Á
Drive Mor eSlowly
You canno tchang eth evehicle level.
Possible causes are :
Ryou are drivingto ofas tfo rth eselecte dvehicle level
Ryou are drivin gto ofas twit h a trailer or th etrailer-couplin gsocke tis
bein gused ,e.g. fo r abicycl erac k
XDrive more slowly and then selec tth edesire dvehicle level again .
RVehicles withth eOff-Road Engineerin gpackage (Ypage 182)
RVehicles wit hth eAIRMATIC package (Ypage 188)
XObserveth enote son towin g atrailer (Ypage 222).
Á
Compresso rIs Cool‐ing
You hav eselecte d ahigher vehicle level. The compressor first needs
to cool down because of frequent level changes.
XDrive in amanne rappropriat efo rth ecurren tvehicle level.
XMak esur ethat there is sufficien tgroun dclearance.
XAllow th ecompressor to cool down .
Whe nth ecompressor has cooled down ,th edisplay messag edis -
appears .The vehicle then continues risin gto th eselecte dlevel.
Á
Malfunction
AIRMATIC is malfunctioning.
XDrive as appropriat efo rth ecurren tvehicle level, but do no texceed
50 mph (80 km/h).
XMak esur ethat there is sufficien tgroun dclearance.
XVisit aqualified specialis tworkshop .
Display messages261
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
Á
Max.Speed 12 mph
You are exceedin gth espeed permissibl efor th eselected off-road
level.
In addition ,th evehicl elevel display appear sabov eth edisplay mes -
sage ,and awarning tone sounds.
GWARNIN G
The vehicl ecould ti pand rollover.
There is aris kof an accident.
XAdjus tyour drivin gstyle to th ealtere dhandlin gcharacteristics .
XOnly makeslight steering movement sand avoid fas tsteering move-
ments .
XDo notexceed 12 mph (20 km/h) until th evehicl ehas reached off -
roa dlevel 2.
Á
Raisin gMax.Speed12 mph
The vehicl eis bein gadjusted to off-road level 3.
In addition ,th evehicl elevel display appear sabov eth edisplay mes -
sage .
The display message refers to th emaximum speed permissibl e
(dependin gon th emodel type) for off-road level 3.
XDo no tdrive at speeds abov e12 mph (20 km/h).
g
LoweringMax .Speed12 mph
The vehicl eis bein glowered from off-road level 3to off-road level 2.
In addition ,th evehicl elevel display appear sabov eth edisplay mes -
sage .
The display message refers to th emaximum speed permissibl e
(dependin gon th emodel type) for off-road level 3.
XDo no texceed 12 mph (20 km/h)until the vehicle has reached off-
road level 2.
ACTIVECURVESYSTEMMalfunctionThe ACTIVE CURVE SYSTEM ismalfunctioning. The vehicle's handlin g
characteristics may beaffected.
XDo not drive at speeds above 50 mph (80 km/h).
XVisit aqualified specialist workshop.
ACTIVECURVESYSTEMMalfunction SeeOperator's Manual
The ACTIVE CURVE SYSTEM ismalfunctioning. The vehicle's handlin g
characteristics are severely impaired. A warning tone also sounds.
GWAR NING
There isa risk of an acc ident.
XDrive on carefully.
XAdjust your driving style to the altered handling characteristics.
XAvoid sudden acceleration around tight corners and fast steering
movements.
XDo not drive at speeds above 50 mph (80 km/h).
XVisit aqualified specialist workshop immediately.
262Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
8
Different.Loc kSys.Malfunction
The differential loc kis malfunctioning .
XDo notdrive at speeds abov e50 mph (80 km/h).
XVisit aqualified specialist workshop .
8
Different.Lockin gSys.Coolin gDow nPlease Wai t
The differential loc kis to ohot and has been disengaged .
XDrive on carefully.
XAllow thedifferential loc kto cool down .
The differential loc kre-engage sas soo nas it has cooled down .
LOW RANGE StopApply ParkingBrakeAgearshift process has been canceled. LOW RANGE is in th eneutral
position .There is no connection between th eengin eand th edrive
wheels.
XPull ove rand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XApply th eelectric parking brake. Do no tcontinu edrivin gunder any
circumstances.
XRepeat th egearshift process.
LOW RANGE Malfunc‐tio nToPark,ApplyBrake
LOW RANGE is malfunctioning .
XDo notdrive at speeds abov e50 mph (80 km/h).
XWhe nparking ,secure th evehicl eagainst rollin gaway (Ypage 159).
XVisitaqualified specialist workshop .
LOW RANGE Max.Speed 25 mphYou haveexceeded th emaximum speed for th egearshift process.
XDrive mor eslowly.
The gear chang eis made .
LOW RANGE Max .Speed 40 mphYou haveexceeded th emaximum speed for th egearshift process.
XDrive mor eslowly.
The gear chang eis made .
LOW RANGE Shift ToPosition NBriefl yYou hav ereduce dth evehicl espeed, but th eautomatic transmission
is no tin position N.
XBriefly shift th eautomatic transmission to position N.
LOW RANGE ShiftingCanceled PleaseReactivat e
The gearshift process has been canceled.
XRepeat thegearshift process.
Ã
Inoperative
DS R(Downhill Speed Regulation )is deactivated due to amalfunction .
XHaveDS Rchecke dat aqualified specialist workshop .
Display messages263
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
TrafficSignAssistCurrently Unavaila‐ble See Operator' sManual
Traffic SignAssis tis temporarily inoperative.
Possibl ecauses are:
Rth ewindshield in th ecamera' sfield of vision is dirty
Rvisibilit yis impaire ddue to heav yrain ,snow or fog
XClean th ewindshield.
If th esystem detects that th ecamera is full yoperational, th edisplay
message disappears.
Traffic Sig nAssis tis operational again .
TrafficSignAssistInoperativeTraffic Sig nAssis tis malfunctioning .
XVisitaqualified specialist workshop .
ë
Off
The HOLD function is deactivated. th evehicl eis skidding.
A warning tone also sounds.
XReactivat eth eHOLD function later (Ypage 185).
LaneKeepin gAssistCurrently Unavaila‐ble See Operator' sManualorActive Lan eKeepingAssist Cur ‐rently UnavailableSee Operator' sMan ‐ual
LaneKeepin gAssis tor Active Lan eKeepin gAssis tis deactivated and
temporarily inoperative.
Possibl ecauses are:
Rth ewindshield in th ecamera' sfield of vision is dirty
Rvisibilit yis impaire ddue to heav yrain ,snow or fog
Rthere hav ebeen no lan emarking sfor an extended period
Rth elan emarking sare worn, dark or covered, e.g. by dir tor snow
Whe nth ecauses state dabov eno longer apply, th edisplay message
disappears.
Lan eKeepin gAssis tor Active Lan eKeepin gAssis tis 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 159).
XClean th ewindshield.
Lan eKeepin gAssistInoperativeorActiveLan eKeepin gAssistInoperative
LaneKeepin gAssis tor Active Lan eKeepin gAssis tis malfunctioning .
XVisitaqualified specialist workshop .
264Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
Blind SpotAssistCurrently Unavaila‐ble See Operator' sManualorActiveBlind Spo tAssistCurrently Unavaila‐ble See Operator' sManual
Blind Spot Assistor Active Blind Spot Assis tis temporarily inoperative.
Possibl ecauses are:
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.
Whe nth ecauses state dabov eno longer apply, th edisplay message
disappears.
Blind Spot Assis tor Active Blind Spot Assis tis 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 159).
XRestart th eengine.
Blind Spo tAssistNot Available Whe nTowingaTraile rSee Operator' sMan ‐ualorAct. BlindSpo tAsst. NotAvailable Whe nTow ‐ing aTraile rSeeOperator' sManual
Blind Spot Assis tor Active Blind Spot Assis tis deactivated while tow-
ing atrailer .
You hav eestablished th eelectrical connection between th etrailer and
your vehicle.
XPress aon thesteering whee lto confirm th edisplay message .
Blind SpotAssistinoperativeorActiveBlind Spo tAssistinoperative
Blind Spot Assis tor Active Blind Spot Assis tis malfunctioning .
The yellow 9indicator lamp salso ligh tup in th eexterio rmirrors.
XVisit aqualified specialist workshop .
ParkingPilot Can ‐celedThe driver's door is open .
XRepeat theparking gap measuremen tand parking process wit hth e
driver's door closed .
You haveinadvertentl ytouched th emultifunction steering whee lwhile
steering intervention was active .
XWhilesteering intervention is active ,mak esur ethat th emultifunc-
tion steering whee lis no ttouched unintentionally.
The vehicl ehas started to skid and ES P®has intervened.
XUse Parking Pilotagain later (Ypage 193).
ParkingPilot Inop‐erativ ePARKTRONI CParking Assis tis malfunctioning or faulty.
XFollow th einstruction sand helpful hints in th e"Problem swit h
PARKTRONI CParking Assist" section (Ypage 193).
If th emultifunction display still shows th edisplay message :
XVisitaqualified specialist workshop .
Display messages265
On-board computer and displays
Z