2021 MERCEDES-BENZ GLC SUV check engine

Brakes
Wa
rning/indicator lamp
Possible causes/consequences and M MSolutions
! Elect ric pa rking brake indi‐
cator lamp (red)
!
The elect ric pa rking brake
(yellow) indicator lamp *T
he red elect ric pa rking brake indicator lamp flashes or is lit.
The yellow elect ric pa rking brake indicator lamp also lights up in theev ent of a malfunction. #
Notethe messages on the multifunction displa y.
J
Brake sy stem warning lamp
(yellow) *T
he yellow brake sy stem warning lamp is lit while the engine is running. &
WARNING Risk of an accident due toa brake sy stem malfunction
If th e brake sy stem is malfunctioning, braking characteristics may be impaired. #
Drive on carefull y. #
Have the brake sy stem checked immediately at a qualified specialist workshop. #
Adjust your speed and drive on carefull y,leaving a suitable dis tance totheve hicle in front. #
Ifth e multifunction display sho wsa display message, obse rve it. Display messages and
warning/indicator lamps 433

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 an additional warning tone sounds, 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 ha vereached their grip limit (/ page186). #
Adapt your driving style to suit thero ad and weather conditions. 436
Display messages and warning/indicator lamps

Setting
the climate style........................ 14 4
Setting the fragrance sy stem.................1 45
Setting theve hicle interior temp era‐
ture........................................................ 14 2
St ationary heater/ ventilation................ 147
Switching on/of f................................... 14 3
Switching there ar wind owheater
on/off................................................... 14 2
THERMATIC contro l panel...................... 14 2
THERMOTRONIC contro l panel..............142
Ve ntilating theve hicle (con venience
opening).................................................. 88
Climate style
Fu nction................................................ 14 4
Setting................................................... 14 4
Clo thes hook .............................................. 11 6
Cockpit Overview................................................... 6
Cof fee cup symbol
see ATTENTION ASSIST
Collision de tection (pa rked vehicle)
Information............................................ 182
Combination switch .................................. 12 9Compu
ter
see On-board computer
Con venience closing ................................... 88
Con venience opening ..................................88
Coolant (engine) Check le vel............................................ 304
No tes....................................................3 65
Cooling see Clima tecontrol
Co pyright..................................................... 37
Cornering light .......................................... .130
Cross Traf fic Alert..................................... 237
Crosswind Assist Function/no tes..................................... 188
Cruise control Activating.............................................. 194
Buttons.................................................. 194
Calling up a spee d................................. 194
Deactivating.......................................... 194
Fu nction................................................ 19 3
Re quirements........................................ 194
Selecting............................................... 194
Setting a speed...................................... 194St
oring a speed.....................................1 94
Sy stem limitations................................. 19 3 D
Dashboa rd
see Cockpit
Data acquisition Vehicle.................................................... 34
Data pr otection rights
Data storage............................................ 37
Data storage
Data pr otection rights............................. 37
Electronic control units........................... 34
Online services........................................ 36
Ve hicle.................................................... 34
Deactivating the alarm (A TA )...................... 94
Deale rship
see Qualified speciali stwo rkshop
Declaration of conformity Electromagnetic compatibility.................26
Jack......................................................... 29
Specific absor ption rate.......................... 26
TIREFIT kit............................................... 30 446
Index

Wi
reless vehicle components.................. 26
Decorative foil (cleaning instructions) .... 308
DeNOx agent see AdBlue ®
De stination entry
En tering a POI or address...................... 269
De tecting inat tentiveness
see ATTENTION ASSIST
Diagnostics connection .............................. 30
Diesel Low outside temp eratures..................... 360
No tes....................................................3 60
Digital Owner's Manual .............................. 20
Dinghy towing
see Tow- bar sy stem
DIRECT SELECT le ver
Engaging drive position........................ .168
Engaging neutral................................... .167
Engaging pa rkposition.......................... 16 8
Engaging pa rkposition automatically.... 16 8
Engaging reve rsege ar........................... 167
Fu nctio n................................................ 16 6Display (care)
.............................................3 10
Display (MBUX multimedia sy stem)
Home screen........................................ .255
Operating.............................................. 256
Display (on-board comp uter)
Displ ays on the multifunction displa y.... 251
Displ aymessage
Calling up (on-board compu ter)............. 370
No tes..................................................... 370
Display messages ¯ - - - km/h .................................... .397
ç - - - km/h ..................................... 398
È - - - km/h ..................................... 397
# 12V battery See Owner's Man‐
ual..........................................................4 12
Û 48 V battery See Owner's Man‐
ual.......................................................... 414
: Active Light Sy stem inoperative... 377
¯ AdBlue sy stem fault Emer. op.:
max. XXX mphSt art not poss. in XXX
miles .................................................... .422 ¯
AdBlue sy stem fault Emer‐
ge ncy op. in XXX km See Owner's
Manual.................................................. 421
¯ AdBlue sy stem fault Engine
st art not possible................................. .422
¯ AdBlue sy stem fault See Own‐
er's Manual ............................................ 421
5 Add 1 litre engine oil when
next refuelling ....................................... 423
é ATTENTION ASSIST inoperative ....396
é ATTENTION ASSIS T:Take a
break! .................................................... 396
: Automatic driving lights inoper‐
ative....................................................... 376
Á Changekey bat teries .................... 374
J Check brake fluid le vel................. 395
# Check brake pads See Owner's
Manual.................................................. 395
5 Check engine oil le vel when
next refuelling ....................................... 423 Index
447

ï
Check trailer hit chlock............... .382
h Checktyre(s)................................ 416
! Clean the fuel filter ...................... 388
ÿ Coolant Stop vehicle Switch
engine off..............................................3 86
! currently una vailable See Own‐
er's Manual .......................................... .407
÷ currently una vailable See Own‐
er's Manual .......................................... .408
5 Engine oil le vel cannot be
measured .............................................. 425
5 Engine oil le velRe duce oil le vel.... 424
5 Engine oil le velSt op vehicle
Switch engine off................................... 424
5 Engine oil pressure Stop
Switch off engine.................................. 425
ä Fault Drive at max. 80 km/h........ 404
6 Front left malfunction Consult
wo rkshop (e xample).............................. 371
& inoperative Battery low................ 380 &
inoperative Refuel vehicle ............ 380
& inoperative See Owner's Man...... 380
! inoperative See Owner's Man‐
ual......................................................... 408
÷ inoperative See Owner's Man‐
ual......................................................... 409
T inoperative See Owner's Manual. .410
G Inoperative.................................... 412
: Intellige nt Light Sy stem inoper‐
ative...................................................... 377
Á Key not de tected (red displ ay
messa ge)............................................... 375
Á Key not de tected (white display
messa ge)............................................... 374
: Left dipped beam (e xamp le)........ .376
6 Left windowbag malfunction
Consult workshop (e xample)................ .371
 Lowe ring...................................... 405
: Malfunction See Owner's Man‐
ual......................................................... 376ð
Maximum speed exceeded ........... 399
Ø ..................................................... 420
ç Off................................................3 98
ë Off................................................ 396
ï Operation only possible in
transmission position P......................... 381
! Parking brake See Owner's
Manual .................................................. 391
Á Please reduce speed .................... 406
Ý Please wait 48 V battery charg‐
ing .......................................................... 414
_ Rear left seat backrest not
loc ked (Example)................................... 385
h Rectify tyre pressure..................... 417
Ø Refill Ad Blue See Owne r’s
Manual.................................................. 420
! Release parking brake .................. 394
¸ Replace air cleaner ...................... 388
Á Replace key.................................. 374
8 Reser vefuel le vel......................... 388 448
Index

Ad
aptive Highbeam Assist Camera
view restricted See Owner's Manual..... 378
Ad aptive Highbeam Assist cur rently
una vailable See Owner's Manual ...........378
Ad aptive Highbeam Assist inoperative.. .378
Ad aptive Highbeam Assist Plus Cam‐
era view restricted See Owner's
Manual.................................................. 379
Ad aptive Highbeam Assist Plus cur‐
re ntly una vailable See Owner's Man‐
ual......................................................... 379
Ad aptive Highbeam Assist Plus inop‐
erative.................................................. .379
Apply brake todeselect Park (P)
position................................................. 389
Apply brake toselect R......................... 389
Au xilia rybattery malfunction (red
display message) ...................................3 91
Au xilia rybattery malfunction (white
display message) ...................................3 91Beginning eme
rgency stop.................... 400
Blind Spot Assist cur rently una vaila‐
ble See Owner's Manual ........................ 401
Blind Spot Assist inope rative ................. 402
Blind Spot Assi stnot available when
to wing a trailer See Owner's Manual .....402
Cannot start engine See Owner's
Manual................................................... 41 5
Check tyre pressures then restart
Ru n Flat Indicator................................... 419
Cruise contro l and Limiter inope rative.. 397
Cruise control inope rative..................... 397
Cruise control off.................................. 397
Fr ont-passenger airbag disabled See
Owner's Manual....................................3 72
Fr ont-passenger airbag enabled See
Owner's Manual....................................3 72
Haza rdwa rning lamps malfunctioning...3 80
Limi ter inoperative................................ 397
Limiter passive...................................... 397 Mercedes me connect Services limi‐
te
d See Owner's Manual........................4 12
Mo tor can be star ted again.................... 41 5
N permanently active Risk of vehicle
ro lling .................................................... 389
Only select Park (P) when vehicle is
st ationary.............................................. 388
Pa rking Assist and PARKTRONIC
inoperative See Owner's Manual ...........406
Pa rking Assist Manoeuvring assis‐
ta nce limited See Owner's Manual........ 406
Place theke y in the mar ked space
See Owner's Manual..............................3 75
PRE-SAFE inoperative See Owner's
Manual.................................................. 373
Ra dar sensors dirty See Owner's
Manual................................................... 411
Re duce speed ........................................ 41 8
Re versing not poss. Consult work‐
shop......................................................3 90450
Index

Risk of
vehicle rolling Driver door
open and transmission not in P............. 389
Ru n Flat Indicator inope rative............... .419
Speed limit (winter tyres) XXX km/h..... 399
St op vehicle Lea veengine running
Wa itTransmission cooling .....................390
To shift out of P or N,depress brake
and start engine.................................... 389
To switch off the engine, press
St art/ Stop button for at least 3 sec‐
onds or 3 times. ................................... .386
Tr af fic Sign Assi stCamera view
re stricted See Owner's Manual............. 401
Tr af fic Sign Assi stcur rently una vaila‐
ble See Owner's Manual ........................ 400
Tr af fic Sign Assi stinope rative ............... 401
Tr ansmission Malfunction Stop............. 390
Ty re press. monitor cur rently una vail‐
able ........................................................ 41 5
Ty re press. monitor inoperative.............. 41 5Ty
re press. monitor inoperative No
wheel sensors ........................................ 416
Ty re pressure Check tyres .....................419
Ty re(s) ove rheated................................. 41 8
Wi thout changing gear, consult work‐
shop......................................................3 90
Display on the windscreen
see Head-up display
Distance control see Active Dis tance Assi stDISTRONIC
DI STRO NIC
see Active Dis tance Assi stDISTRONIC
Door Additional door loc k................................ .76
Child saf ety lock (rear door).................... 70
Locking/unlocking (emer gency key)....... 80
Opening (from inside ).............................. 77
Un locking (from inside).......................... .77
Door cont rol panel....................................... 16
Dr aw bar
see Tow- bar sy stem
Drive Away Assist ...................................... 236 Drive
Away Assist
see Pr otection against collision
Drive position Enga ging................................................1 68
Drive prog ram display ............................... 16 5
Drive prog rams
see DYNA MIC SELECT
Driver's seat see Seat
Driving abroad Light adjustment (low beam)................. 127
Driving saf ety sy stem
ABS (Anti-lock Braking Sy stem).............1 86
Ac tive Brake Assi st................................ 206
Ad aptive brake lights............................. 191
BA S (Brake Assi stSystem).................... 186
Cameras............................................... .184
EBD (Electronic Brake forc e Distribu‐
tion).......................................................1 89
ESP ®
Crosswind Assist.......................... 188
ESP ®
trailer stabilisation.......................1 88
Overview.............................................. .185
Ra dar and ultrasonic sensor s................ 184
Re sponsibility........................................1 84 Index
451

Electrical fuses
see Fuses
Electromagnetic compatibility Declaration of conformity........................ 26
Electronic Stability Prog ram
see ESP ®
(Electronic Stability Prog ram)
Emer gency
Fire extinguisher.................................... 314
Fir st-aid kit (so ftsided).......................... 314
Overview of the help functions................ 18
Re moving thewa rning triangle.............. .313
Saf etyve st............................................. 313
Setting up thewa rning triangle............. .313
Emer gency braking ................................... 182
Emer gency braking
see BAS (Brake Assi stSystem)
Emer gency call
see Mercedes-Benz emer gency call sy stem
Emer gency engine start............................ 331
Emer gency key
Inserting/removing.................................75
Locking/unlocking the doors.................. 80
Un locking theta ilgate............................ .86Emer
gency operation mode
St arting theve hicle...............................1 54
Emer gency spare wheel
Inflating................................................. 351
No tes....................................................3 50
Engine ECO start/ stop function........................ 16 0
Engine number...................................... 355
St arting (eme rgency operation mode)...1 54
St arting (Remo teOnline).......................1 55
St arting (s tart/s top button).................. 15 3
St arting assis tance................................ 325
Switching off (s tart/s top button).......... 17 7
Engine bonnet Function (active bonnet)........................ 298
Opening/closing................................... 298
Engine data Displaying.............................................. 16 6
Engine electronics Notes....................................................3 53
Engine number......................................... .355
Engine oil Additives...............................................3 63Capacity................................................ 363
Che
cking the oil le vel using the oil
dipstick..................................................3 01
Checking the oil le vel using the on-
board computer..................................... 302
MB-Fr eigabe or MB-Appr oval................ .363
Quality................................................... 363
To pping up............................................. 302
EQ Boost technology
Operating saf ety...................................... 24
ERA-GLONASS test mode
St arting/ending.................................... 288
Er ro r message
see Displ aymessa ge
ESC (Electronic Stability Control)
see ESP ®
(Electronic Stability Prog ram)
ESP ®
Crosswind Assis t.................................. .188
Tr ailer stabilisation................................ 188
ESP ®
(Electronic Stability Prog ram)
Ac tivating/deactivating................. 188, 189
Fu nction/no tes..................................... 186
EU general operating permit number ...... 355 Index
453