2020 MERCEDES-BENZ GLS SUV check engine

Driving saf
ety sy stems Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
! ABS warning lamp *T
he yellow ABS warning lamp is lit while the engine is running.
ABS is malfunctioning.
If th ere is an additional warning tone, EBD is malfunctioning.
Other driving sy stems and driving saf ety sy stems may also be malfunctioning. #
Notethe messages on the multifunction displa y. &
WARNING Thereis a risk of skidding if EBD or ABS is malfunctioning
The wheels may lock during braking.
The steerability and braking characteristics are heavily impaired and the braking dis tance may increase. In addi‐
tion, other driving saf ety sy stems are switched off. #
Drive on carefull y. #
Have the brake sy stem checked immediately at a qualified specialist workshop. ÷
ESP ®
wa rning lamp flashes *
The yellow ESP ®
wa rning lamp flashes while theve hicle is in motion.
One or more wheels has reached its grip limit (/ page 227). #
Adapt your driving style to suit thero ad and weather conditions. 502
Display messages and warning/indicator lamps

Inserting/removing
theflacon (fra‐
gr ance sy stem)...................................... 178
Ionisation...............................................1 78
No te....................................................... 174
Re ar air vents........................................ 184
Re ar operating unit................................ 175
Re sidual heat......................................... 17 7
Re sidual heat (rear operating unit)........ 178
Setting (MBUX multimedia sy stem)....... 175
Setting the air distribution..................... 174
Setting the air flow ................................. 174
Setting the fragrance sy stem.................1 78
Setting theve hicle interior temp era‐
ture........................................................ 174
St ationary heater/ ventilation................ 180
Switching on/of f................................... 175
Switching there ar wind owheater
on/off....................................................1 74
THERMATIC contro l panel...................... 174
THERMOTRONIC contro l panel..............174
Ve ntilating theve hicle (con venience
opening).................................................. 94
Wi ndsc reen heating............................... 17 9
Coat hook .................................................. .144 Cockpit
Overview................................................... 6
Cof fee cup symbol
see ATTENTION ASSIST
Collapsible spare wheel Inflating.................................................. 411
No tes....................................................4 09
Re moving............................................... 41 0
Collision de tection (pa rked vehicle) ........ 223
Combination switch .................................. 15 8
Compu ter
see On-board computer
Consum ption indicator
Calling up.............................................. 204
Con venience closing ................................... 95
Con venience opening ..................................94
Coolant (engine) Check le vel............................................ 362
No tes..................................................... 424
Cooling see Climate control
Co pyright..................................................... 38 Cornering light
...........................................1 59
Co ver
see Roller sunblind
Cross Traf fic Alert..................................... 293
Crosswind Assist Function/no tes..................................... 228
Cruise control Activating.............................................. 235
Buttons.................................................. 235
Calling up a spee d................................. 235
Deactivating.......................................... 235
Fu nction................................................ 233
Re quirements........................................ 235
Selecting.............................................. .235
Setting a speed..................................... 235
St oring a speed.....................................2 35
Sy stem limitations................................. 233
Cup holder Switching the cooling/heating func‐
tion on/off............................................1 46
Cushionbag.................................................. 45 512
Index

¯
AdBlue sy stem fault Emer‐
ge ncy op. in XXX miles See Owner's
Manual.................................................. 487
¯ AdBlue sy stem fault Engine
st art not possible................................. .488
¯ AdBlue sy stem fault See Own‐
er's Manual .......................................... .487
5 Add 1 litre engine oil when
next refuelling....................................... 488
é ATTENTION ASSIST inoperative ....460
é ATTENTION ASSIS T:Take a
break!....................................................4 60
: Automatic driving lights inoper‐
ative...................................................... 439
Á Change key bat teries .................... 437
J Check brake fluid le vel................. 459
# Check brake pads See Owner's
Manual.................................................. 459
ï Check trailer hitch lo ck................ 443
h Check tyre(s)............................... .483 !
Clean the fuel filter ...................... 452
Á Compressor is cooling ..................473
ÿ Coolant Stop vehicle Switch
engine off..............................................4 51
_ Currently una vailable Camera
view restricted....................................... 469
ç Currently unavailable Radar
sensors dirty.........................................4 68
! currently una vailable See Own‐
er's Manual ............................................ 474
÷ currently una vailable See Own‐
er's Manual ............................................ 475
5 Engine oil le vel cannot be
measured .............................................. 490
5 Engine oil le velRe duce oil le vel.... 489
5 Engine oil le velSt op vehicle
Switch engine off.................................. 489
5 Engine oil pressure Stop
Switch off engine.................................. 490 ä
Fault Drive at max. 80 km/h
...................................................... 470, 471
ä Fault Stop.....................................4 71
6 Front left malfunction Consult
wo rkshop (e xample).............................. 434
& inoperative Battery low................ 442
& inoperative Refuel vehicle ............ 442
& inoperative See Owner's Man....... 441
! inoperative See Owner's Manual ..475
÷ inoperative See Owner's Manual ..476
T inoperative See Owner's Man‐
ual......................................................... 477
G Inoperative................................... 478
î inoperative................................... 463
: Intelligent Light Sy stem inoper‐
ative...................................................... 440
Á Key not de tected (red displ ay
messa ge)............................................... 438
Á Key not de tected (white displ ay
messa ge)............................................... 437 514
Index

;
Engine diagnosis warning lamp... .496
å ESP®
OFF warning lamp.............. .503
÷ ESP®
wa rning lamp flashes.......... 502
÷ ESP®
wa rning lamp lights up........ 503
8 Fuelreser vewarning lamp
lights up............................................... .497
Ù Powe rst eering warning lamp
(red)...................................................... 493
6 Restra int sy stem warning lamp... .492
ü Seat belt warning lamp flashes.... 492
ü Seat belt warning lamp lights
up......................................................... .493
ä Suspension warning lamp (red).... 501
ä Suspension warning lamp (yel‐
low)....................................................... 501
! The elect ric pa rking brake (yel‐
low) indicator lam p................................ 498
ï Trailer tow hit chwarning lamp..... 494
h Tyre pressure monitoring sys‐
te m wa rning lamp flashes.................... .504 h
Tyre pressure monitoring sys‐
te m wa rning lamp lights up................... 505
L Warning lamp for dis tance
wa rning function................................... 500
Wa rning/indicator lamps
Overview.............................................. .490
PA SSENGER AIR BAG.............................. 50
Wa rranty ...................................................... 34
Wa sher fluid
see Windsc reen washer fluid
Wa shing byhand (care)............................ 367
Wa ter tank
see Air-water duct
We ather information ................................. 329
We b br owsers
Overview (multimedia sy stem).............. 340
Wheel change
Fitting a new wheel............................... 406
Lo we ring theve hicle.............................4 06
Prepa ration........................................... 402
Ra ising theve hicle................................ 403
Re moving a whee l................................. 405 Re
moving/fitting hub caps................... .402
Wheel change
see Emergency spa rewheel
Wheel rotation........................................... 400
Wheels Care...................................................... 369
Changing hub caps................................ 402
Checking............................................... 393
Checking the tyre pressure (tyre
pressure monitoring sy stem)................. 396
Fitting.................................................... 406
Flat tyre.................................................3 74
Inter changing........................................ 400
MOExtended tyres................................ .375
No ise.................................................... .393
No tes on fitting..................................... 397
Re moving.............................................. 405
Re placing...................................... 397, 402
Re starting the tyre pressure monitor‐
ing sy stem.............................................3 97
Selection............................................... 397
Snow chains......................................... .393
St oring...................................................4 01
TIREFIT kit..............................................3 76
Ty re pressure (No tes)............................ 394 540
Index