engine MERCEDES-BENZ GLS 2018 Owners Manual

Display messages
Possible causes/consequences and P Solutions
The yellow $ warning lamp lights up. The red I (US A only)
or $ (Canada only) indicator lamp flashes for about te n seconds
after th e electric parking brak e has been applie d or released. It then
goe s out or remain s lit .
The electric parking brak e is malfunctioning .X
Switc h off th e ignition and tur n it bac k on .X
Apply th e electric parking brake.
If it is no t possibl e to engage th e electric parking brake:X
Shift th e transmission to position ] .X
Visit a qualified specialist workshop .
If it is no t possibl e to release th e electric parking brake:X
Releas e th e electric parking brak e automatically ( Y
page 162).
If th e electric parking brak e still canno t be released:X
Consult a qualified specialist workshop .
The yellow $ warning lamp lights up. If you manually apply or
release th e electric parking brake, th e red I (US A only) or $
(Canada only) indicator lamp flashes .
The electric parking brak e is malfunctioning . It is no t possibl e to apply
th e electric parking brak e manually.X
Shift th e transmission to position ] .X
Visit a qualified specialist workshop .
I (US A
only)
$ (Canada
only)
Parkin g Brake Inop‐
erativ e The yellow $ warning lamp lights up. The red I (US A only)
or $ (Canada only) indicator lamp flashes for about te n seconds
after th e electric parking brak e has been applie d or released. It then
goe s out or remain s lit .
The electric parking brak e is malfunctioning , e.g. because of over-
voltag e or undervoltage. X
Remove th e caus e for th e overvoltage or undervoltage, e.g. by
charging th e battery or restarting th e engine.X
Engage or release th e electric parking brake.
If it remain s impossible to apply or release th e electric parking brake:X
Switc h off th e ignition and tur n it bac k on .X
Engage or release th e electric parking brake.
If th e electric parking brak e still canno t be released:X
Consult a qualified specialist workshop .
If th e electric parking brak e still canno t be applied:X
Visit a qualified specialist workshop .Display messages 25 3
On-board computer and displays Z

Display messages
Possible causes/consequences and P Solutions
The yellow $ warning lamp lights up and th e red I (US A only)
or $ (Canada only) indicator lamp flashes .
It is no t possibl e to apply th e electric parking brak e manually.X
Shift th e transmission to position ] .X
Visit a qualified specialist workshop .
' (US A only)
M (Canada only)
Check Brake Fluid
Level There is no t enough brak e flui d in th e brak e flui d reservoir . In addition ,
th e ' (US A only) or M (Canada only) warning lamp lights up in
th e instrumen t cluste r and a warning tone sounds.
G WARNIN G
The braking effec t may be impaired.
There is a ris k of an accident.X
Pull ove r and stop th e vehicl e safely as soo n as possible, payin g
attention to roa d and traffic conditions. Do no t continu e drivin g
under any circumstances. X
Secur e th e vehicl e against rollin g away ( Y
page 161).X
Consult a qualified specialist workshop .X
Do no t add brak e fluid . This does no t correc t th e malfunction .
& Check Brake Pad Wea r The brak e pads/linings hav e reached their wear limit.
US A only: th e ' red brak e system warning lamp is lit while th e
engin e is running. X
Visit a qualified specialist workshop .
S Inoperative On e or mor e main features of th e mbrace system are malfunctioning .X
Visit a qualified specialist workshop .
Active Brake Assist
Functions Currently
Limite d See Opera‐
tor's Manual Active Brake Assis t wit h cross-traffic function is temporarily inopera-
tive.
Possibl e causes are: R
The radar sensor system is temporarily inoperative, e.g. due to
electromagneti c radiation emitted by nearby TV or radi o station s or
other source s of electromagneti c radiation .R
The system is outside th e operating temperature range.R
The on-boar d voltag e is to o low.
Whe n th e causes state d abov e no longer apply, th e display message
disappears.
Active Brake Assis t wit h cross-traffic function or PRE ‑ S AF E ®
PLU S is
functional again .
If th e display message does no t disappear :X
Pull ove r and stop th e vehicl e safely as soo n as possible, payin g
attention to roa d and traffic conditions.X
Secur e th e vehicl e against rollin g away ( Y
page 161).X
Restart th e engine.254
Display messages
On-board computer and displays

Display messages
Possible causes/consequences and P Solutions
Active Brake Assist
Functions Currently
Limite d See Opera‐
tor's Manual Active Brake Assis t is unavailable due to a malfunction . Adaptive
Brake Assis t may also hav e failed.X
Visit a qualified specialist workshop immediately.
PRE-SAFE Inopera‐
tiv e See Operator' s
Manual Importan t function s of PRE-SAF E ®
hav e failed. Al l other occupant
safet y systems , e.g. air bags , remain available.X
Visit a qualified specialist workshop immediately.
Active Brake Assist
Functions Currently
Limite d See Opera‐
tor's Manual Active Brake Assis t or PRE ‑ SAFE ®
PLU S is temporarily inoperative.
Possibl e causes are: R
Function is impaire d due to heav y rain or snow.R
The radar sensor system is temporarily inoperative, e.g. due to
electromagneti c radiation emitted by nearby TV or radi o station s or
other source s of electromagneti c radiation .R
Mercedes-AMG vehicles: ES P ®
is deactivated.R
The system is outside th e operating temperature range.R
The on-boar d voltag e is to o low.
Whe n th e causes state d abov e no longer apply, th e display message
disappears.
Active Brake Assis t or PRE ‑ SAFE ®
PLU S is operative again .
If th e display message does no t disappear :X
Pull ove r and stop th e vehicl e safely as soo n as possible, payin g
attention to roa d and traffic conditions.X
Secur e th e vehicl e against rollin g away ( Y
page 161).X
Restart th e engine.X
Mercedes-AMG vehicles: switch ES P ®
on again ( Y
page 71).
Active Brake Assist
Functions Limite d
See Operator' s Man ‐
ual Active Brake Assis t wit h cross-traffic function or PRE ‑ S AF E ®
PLU S is
no t available due to a malfunction .X
Visit a qualified specialist workshop immediately. Display messages 25 5
On-board computer and displays Z

Display messages
Possible causes/consequences and P Solutions
Radar Sensor s Dirty
See Operator' s Man ‐
ual The radar sensor system is malfunctioning .
Possibl e causes are: R
dir t on sensor sR
heav y rain or snow R
when drivin g on inter-urban roads without traffic or infrastructure,
e.g. in desert-like area s
At least on e drivin g system or drivin g safet y system is malfunctioning
or is temporarily unavailable :R
PRE-SAF E ®
PLU SR
Active Brake Assis tR
Active Lan e Keepin g Assis tR
Active Blind Spot Assis tR
Distanc e Pilo t DISTRONI C
If th e radar sensor system in fron t is dirty, Active Blind Spot Assis t will
no t perfor m a course-correcting brak e application .
A warning tone also sounds.
Once th e caus e of th e problem is no longer present, th e drivin g and
drive safet y systems will be available again . The display message dis-
appears.
If th e display message does no t disappear :X
Pull ove r and stop th e vehicl e safely as soo n as possible, payin g
attention to roa d and traffic conditions.X
Secur e th e vehicl e against rollin g away ( Y
page 161).X
Switc h off th e engine.X
Clean all sensor s ( Y
page 334).X
Restart th e engine.
The display message disappears.
u SRS Malfunction Ser ‐
vic e Required The restrain t system is malfunctioning .
The u warning lamp also lights up in th e instrumen t cluster.
G WARNIN G
The air bags or Emergency Tensioning Devices may either be triggered
unintentionally or, in th e event of an accident, may no t be triggered .
There is an increased ris k of injury.X
Visit a qualified specialist workshop immediately.
Fo r further information about th e restrain t system, see ( Y
page 44) .
u Front Lef t Malfunc‐
tio n Servic e
Required or Front
Lef t Malfunction
Servic e Required The restrain t system has malfunctioned at th e fron t on th e lef t or right .
The u warning lamp also lights up in th e instrumen t cluster.
G WARNIN G
The air bags or Emergency Tensioning Devices may either be triggered
unintentionally or, in th e event of an accident, may no t be triggered .
There is an increased ris k of injury.X
Visit a qualified specialist workshop immediately.256
Display messages
On-board computer and displays

Display messages
Possible causes/consequences and P Solutions
I Switch Off Lights You leav e th e vehicl e and th e lights are switched on . A warning tone
also sounds. X
Turn th e ligh t switch to th e X position .
I Switch On Headlamps You are drivin g wit h low-beam headlamp s switched off .X
Turn th e ligh t switch to th e X or X position .
Adaptive Highbeam
Assist Currently
Unavailable See
Operator' s Manual Adaptive Highbea m Assis t is deactivated and temporarily inoperative.
Possibl e causes are: R
The windshield in th e camera' s field of vision is dirty.R
Visibilit y is impaire d due to heav y rain , snow or fog .X
Clean th e windshield.
If th e system detects that th e camera is full y operational, th e Adap‐
tiv e Highbeam Assist Now Available message is displayed.
Adaptive Highbea m Assis t is operational again .
Adaptive Highbeam
Assist Inoperative Adaptive Highbea m Assis t is faulty.X
Visit a qualified specialist workshop .
Engine Display messages
Possible causes/consequences and P Solutions

Display messages
Possible causes/consequences and P Solutions
= Sto p Vehicl e See
Operator' s Manual The battery is no longer bein g charged and th e condition of charg e is
to o low.
A warning tone also sounds. X
Pull ove r and stop th e vehicl e safely and switch off th e engine, pay-
ing attention to roa d and traffic conditions.X
Secur e th e vehicl e against rollin g away ( Y
page 161).X
Observ e th e instruction s in th e = See Operator' s Manual
display message .X
Consult a qualified specialist workshop .

Display messages
Possible causes/consequences and P Solutions
Blind Spo t Assist
Currently Unavaila‐
ble See Operator' s
Manual or Active
Blind Spo t Assist
Currently Unavaila‐
ble See Operator' s
Manual Blind Spot Assis t or Active Blind Spot Assis t is temporarily inoperative.
Possibl e causes are: R
The radar sensor system is outside th e operating temperature
range. R
The radar sensor system is temporarily inoperative, e.g. due to
electromagneti c radiation emitted by nearby TV or radi o station s or
other source s of electromagneti c radiation .
The yellow c indicator lamp s also ligh t up in th e exterio r mirrors.
Whe n th e causes state d abov e no longer apply, th e display message
disappears.
Blind Spot Assis t or Active Blind Spot Assis t is operational again .
If th e display message does no t disappear :X
Pull ove r and stop th e vehicl e safely as soo n as possible, payin g
attention to roa d and traffic conditions.X
Secur e th e vehicl e against rollin g away ( Y
page 161).X
Restart th e engine.
Blind Spo t Assist
Not Available Whe n
Towing a Traile r
See Operator' s Man ‐
ual or Active Blind
Spo t Assist Not
Available Whe n Tow ‐
ing a Traile r See
Operator' s Manual Blind Spot Assis t or Active Blind Spot Assis t is deactivated while tow-
ing a trailer .
You hav e established th e electrical connection between th e trailer and
your vehicle. X
Press v on th e steering whee l to confirm th e display message .
Blind Spo t Assist
Inoperative or
Active Blind Spo t
Assist Inoperative Blind Spot Assis t or Active Blind Spot Assis t is malfunctioning .
The yellow c indicator lamp s also ligh t up in th e exterio r mirrors.X
Visit a qualified specialist workshop .
Parkin g Pilot Can ‐
celed The driver's door is open .X
Repeat th e parking gap measuremen t and parking process wit h th e
driver's door closed .
You hav e inadvertentl y touched th e multifunction steering whee l while
steering intervention was active .X
Whil e steering intervention is active , mak e sur e that th e multifunc-
tion steering whee l is no t touched unintentionally.
The vehicl e has started to skid and ES P ®
has intervened.X
Use Parking Pilo t again later ( Y
page 195).Display messages 26 9
On-board computer and displays Z

Display messages
Possible causes/consequences and P Solutions
Parkin g Pilot Inop‐
erativ e Parking Assis t PARKTRONI C is malfunctioning or faulty.X
Follow th e instruction s and helpful hints in th e "Problem s wit h
Parking Assis t PARKTRONIC" section ( Y
page 195).
If th e multifunction display still shows th e display message :X
Visit a qualified specialist workshop .
Parking Pilo t is unavailable or malfunctioning .X
Switc h off th e ignition and restar t th e engine.
If th e Parking Pilo t continues to be unavailable (the ] symbol does
no t appear in th e multifunction display):X
Visit a qualified specialist workshop .
Parkin g Pilot Fin ‐
ished The vehicl e is parked. A warning tone also sounds.
The display message disappear s automatically.
Distance Pilot Off Distanc e Pilo t DISTRONI C is deactivated.
If a warning tone also sounds, Distanc e Pilo t has deactivated auto -
matically ( Y
page 176).
Distance Pilot Now
Available Distanc e Pilo t DISTRONI C is operational again after having been tem-
porarily unavailable . You can no w reactivat e Distanc e Pilo t
DISTRONI C ( Y
page 176).
Distance Pilot Cur ‐
rently Unavailable
See Operator' s Man ‐
ual Distanc e Pilo t DISTRONI C is temporarily inoperative.
Steering Pilo t is also temporarily inoperative.
Possibl e causes are: R
The radar sensor system is temporarily inoperative, e.g. due to
electromagneti c radiation emitted by nearby TV or radi o station s or
other source s of electromagneti c radiation .R
The system is outside th e operating temperature range.R
The on-boar d voltag e is to o low.
A warning tone also sounds.
Whe n th e causes state d abov e no longer apply, th e display message
disappears.
Distanc e Pilo t DISTRONI C is operational again .
If th e display message does no t disappear :X
Pull ove r and stop th e vehicl e safely as soo n as possible, payin g
attention to roa d and traffic conditions.X
Secur e th e vehicl e against rollin g away ( Y
page 161).X
Restart th e engine.270
Display messages
On-board computer and displays

Display messages
Possible causes/consequences and P Solutions
Tir e Pressure Moni‐
tor Inoperative No
Wheel Sensor s The wheels mounte d do no t hav e a suitable tire pressur e sensor . The
tire pressur e monitor is deactivated. X
Moun t wheels wit h suitable tire pressur e sensors.
The tire pressur e monitor is activated automatically after drivin g for
a few minutes.
Tir e Press. Monito r
Inoperative The tire pressur e monitor is faulty.X
Visit a qualified specialist workshop .
Vehicle Display messages
Possible causes/consequences and P Solutions
Shift to 'P' or 'N'
to Start Engine You attempte d to start th e engin e wit h th e transmission in position ^
or [ . X
Shift th e transmission to position ] or \\ .
Apply Brake to
Shift fro m 'P' You attempte d to shift th e transmission to position [ , ^ or \\
without depressing th e brak e pedal .X
Depress th e brak e pedal .
To Deselect P or N,
Depres s Brake and
Start Engine You attempte d to shift th e transmission out of position ] or \\ int o
another transmission position wit h th e engin e switched off .X
Depress th e brak e pedal .X
Start th e engine.
Apply Brake to
Select R You hav e attempte d to shift from position [ to position ^ without
applyin g th e brakes. X
Depress th e brak e pedal .X
Shift th e transmission to position ^ .
Transmission Not in
P Ris k of Vehicl e
Rollin g Awa y The driver's door is open or no t fully closed and th e transmission is in
position ^ , \\ or [ .
A warning tone also sounds.
G WARNIN G
The vehicl e may rol l away.
There is a ris k of an accident.X
Shift th e transmission to position ] .X
Secur e th e vehicl e against rollin g away ( Y
page 161).X
Clos e th e driver's door completely.
Onl y Shift to 'P'
whe n Vehicl e is Sta ‐
tionar y The vehicl e is moving .X
Stop th e vehicl e safely as soo n as possible, payin g attention to roa d
and traffic conditions. X
Shift th e transmission to position ] .Display messages 27 5
On-board computer and displays Z

Display messages
Possible causes/consequences and P Solutions
Servic e Required Do
Not Shift Gears
Visit Dealer You canno t chang e th e transmission position due to a malfunction .
A warning tone also sounds.
If transmission position [ is selected:X
Drive to a qualified specialist workshop without shifting th e trans -
mission from position [ .
If position ^ , \\ or ] is selected:X
Secur e th e vehicl e against rollin g away ( Y
page 161).X
Notify a qualified specialist workshop or breakdown service.
Reversing Not Possi‐
ble Servic e Required You can no longer shift to transmission position ^ due to a malfunc -
tion .
Transmission position s ] , \\ or [ continu e to be available.
A warning tone also sounds. X
Visit a qualified specialist workshop .
Transmission Mal ‐
function Sto p A malfunction has occurred in th e mechanical transmission compo -
nents.
A warning tone also sounds. The transmission shift s automatically to
position \\ . X
Pull ove r and stop th e vehicl e safely as soo n as possible, payin g
attention to roa d and traffic conditions.X
Shift th e transmission to position ] .X
Secur e th e vehicl e against rollin g away ( Y
page 161).X
Notify a qualified specialist workshop or breakdown service.
Auxiliary Batter y
Malfunction The auxiliary battery for th e automatic transmission is no longer bein g
charged. X
Visit a qualified specialist workshop .X
Unti l then , always set th e automatic transmission to position ]
before switching off th e engine.X
Befor e leaving th e vehicle, apply th e electric parking brake.
e The tailgat e is open
G WARNIN G
Whe n th e engin e is running, exhaust gase s can ente r th e vehicl e inte-
rio r if th e tailgat e is open .
There is a ris k of poisoning .X
Clos e th e tailgate.276
Display messages
On-board computer and displays