2021 MERCEDES-BENZ GLC COUPE fuel

Wa
rning/indicator lamp
Possible causes/consequences and M MSolutions #
Stop theve hicle immediately in accordance with the traf fic conditions and switch off the engine. Do not continue
driving. #
Notethe messages on the multifunction displa y.
If th e coolant temp erature display is at the lo wer end of thete mp erature scale: #
Consult a qualified specialist workshop.
If th e coolant temp erature display is at the upper end of thete mp erature scale: #
Exit theve hicle and keep a safe dis tance from it until the engine has cooled down. #
Check the coolant le vel (/ page 304). #
Make sure that the air supply tothera diator is not obstructed. #
Avoiding high loads on the engine, drive tothe nearest qualified specialist workshop. In doing so, ensure that the
coolant temp erature display remains below 120°C.
; Engine diagnosis warning
lamp *T
he yellow engine diagno stics warning lamp is lit while the engine is running.
A malfunction has occu rred in the engine, theex haust sy stem or the fuel sy stem.
The emissions limit value may ha vebeen exceeded and the engine may be running in eme rgency operation mode. #
Have theve hicle checked as soon as possible at a qualified specialist workshop.
Ve hicles with a diesel engine: the fuel tank may ha vebeen run dr y. #
Start the engine thre eto four times af terre fuelling.
If th eye llow engine diagnosis warning lamp goes out, emer gency operation mode is cancelled. The vehicle need
not be checked. Display messages and
warning/indicator lamps 431

Wa
rning/indicator lamp
Possible causes/consequences and M MSolutions
# Elect rical fault warning
lamp *T
hered elect rical fault warning lamp is lit.
There is a fault in the electrics. #
Notethe messages on the multifunction displa y.
8
Fu elreser vewarning lamp
lights up *T
he yellow fuel reser ve wa rning lamp lights up while the engine is running.
The fuel supp lyhas dropped into there ser verange. #
Refuel. 432
Displaymessa ges and warning/indicator lamps

Sy
stem limitations................................. 232
Ac tive Se rvice Sy stem PLUS
see AS SYST PLUS
Ac tive Speed Limit Assi st
Displ ay.................................................. 200
Fu nction................................................ 200
Ac tive Steering Assist
Ac tivating/deactivating......................... 205
Ac tive Emergency Stop Assis t............... 205
Fu nction................................................ 203
Sy stem limits.........................................2 03
Ad aptive brake lights ................................ 191
Ad aptive cruise control
see Active Dis tance Assi stDISTRONIC
Ad aptive functions, MULTIBEAM LED
see Intelligent Light Sy stem
Ad aptive Highbeam Assist
Fu nction................................................ 13 2
Switching on/of f................................... 13 3
Ad aptive Highbeam Assist Plus
Fu nction................................................ 13 3
Switching on/of f................................... 13 4Ad
Blue ®
Ad ditives...............................................3 62
Capacity................................................ 362
No tes..................................................... 174
Purity..................................................... 362
To pping up............................................. 175
Ad ditional door lo ck.................................... 76
Ad diti ves
Ad Blue ®
................................................ 362
Engine oil.............................................. 363
Fu el....................................................... 360
Ad diti ves (AdBlue ®
)
see AdBlue ®
Ad diti ves (engine oil)
see Additives
Ad diti ves (fuel)
see Fuel
ADS PLUS damping sy stem
see AIR BODY CONTROL
Af ter-sales service centre
see ASS YST PLUS
AIR BODY CONT ROL
Setting................................................... 219Suspension............................................
217
Air conditioning menu Calling up.............................................. 14 3
Air distribution Setting................................................... 14 2
Setting (MBUX multimedia sy stem)....... 14 4
Air freshener sy stem
see Frag rance sy stem
Air inlet see Air-water duct
Air pressure see Tyre pressure
Air suspension see AIR BODY CONTROL
Air vents
Ad justing (front).................................... .151
Ad justing (rear)..................................... .151
Air vents
see Air vents
Ai r-conditioning sy stem
see Climate control
Air-recirculation mode.............................. 14 5 Index
441

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

ST
EER CONTROL................................... 189
Driving sy stem
DY NA MIC BODY CONTROL.................... 217
Driving sy stem
see 360° Camera
see Active Blind Spot Assi st
see Active Dis tance Assi stDISTRONIC
see Active Emergency Stop Assist
see Active Lane Keeping Assist
see Active Parking Assist
see Active Speed Limit Assi st
see Active Steering Assist
see AIR BODY CONTROL
see ATTENTION ASSIST
see Blind Spot Assist
see Cruise control
see Driving saf ety sy stem
see HOLD function
see Limiter
see Parking Assist PARKTRONIC
see Reversing camera
see Traf fic Sign Assi st
Driving tips Driving abroad (low beam light
adjustment).......................................... .127 Gene
ral driving tips.............................. .157
optimised acceleration.......................... 15 6
Ru nning-in no tes.................................... 15 5
Dr ow siness de tection
see ATTENTION ASSIST
DY NA MIC BODY CONT ROL
Chassis.................................................. 217
Dynamic handling cont rol sy stem
see ESP ®
(Elect ronic Stability Prog ram)
DY NA MIC SELECT
Calling up the fuel consum ption indi‐
cator..................................................... .166
Configuri ng drive program I................... 16 5
Displ aying engine dat a.......................... 16 6
Displ aying vehicle dat a.......................... 16 6
Drive program display............................ 16 5
Drive programs...................................... 16 4
Fu nction................................................ 16 4
Operating (DYNAMIC SELECT switch)....1 65
Selecting the drive prog ram.................. 16 5 E
E10 ............................................................ .359 Easy entry
feature
Fu nction/no tes..................................... 106
Easy exitfeature
Fu nction/no tes..................................... 106
EAS Y-PA CK load-securing kit
Ins talling/ removing thete lescopic rod.. 11 9
No tes..................................................... 11 9
EBD (Electronic Brake forc e Distribu‐
tion)
Function/no tes..................................... 189
ECO Assist Function/no tes..................................... 16 2
ECO display Function................................................. 161
ECO start/s top function
Au tomatic engine start.......................... 16 0
Au tomatic engine stop...........................1 60
Operation.............................................. 16 0
Switching off/on.................................... 161
Electric pa rking brake
Applying automaticall y.......................... 180
App lying/ releasing manuall y................. 182
Emergency braking................................ 182
Re leasing automaticall y......................... 181452
Index

Exterior lighting
Care...................................................... 309
Exterior lighting see Lights F
Fa tigue de tection
see ATTENTION ASSIST
Fire extinguisher........................................ 314
Fi rs t-aid kit (soft sided) .............................314
Flacon Inserting/removin g............................... 14 6
Flat towing
see Tow- bar sy stem
Flat tyre MOEx tended tyres................................. 315
No tes..................................................... 315
TIREFIT kit..............................................3 17
Wheel chang e....................................... .345
Floor mats.................................................. 12 5
Fo g light (enhanced) .................................. 131Fo
il co vering
Ra dar and ultrasonic sensor s................184
Fr ag rance
see Fragrance sy stem
Fr ag rance sy stem
Inserting/removing theflacon...............1 46
Setting................................................... 14 5
Fr ee software.............................................. .37
Fr equencies
Mobile phon e....................................... .354
Tw o-w ayradio.......................................3 54
Fr ont airbag (driver, front passenger).......44
Fr ont passenger seat
see Seat
Fu el
Ad ditives...............................................3 60
Diesel.................................................... 360
E10....................................................... .359
Fu elreser ve........................................... 361
Low outside temp eratures..................... 360
Pe trol..................................................... 359
Quality (diesel)...................................... 360
Quality (p etro l)...................................... 359 Re
fuelling............................................... 171
Sulphur content..................................... 359
Ta nk content.......................................... 361
Fu el consum ption indicator
Calling up.............................................. 16 6
Fu nction seat
see Door cont rol panel
Fu ses
Before replacing a fuse.......................... 331
Fu se assignment diagram...................... 331
Fu se box in the engine compartmen t.... 332
Fu se box in the front passenger foot‐
we ll....................................................... 333
Fu se box in the load compartment........ 334
Fu se box on the dashboard................... 333
No tes..................................................... 331 G
Garage door opener Cleari ngthe memory.............................1 80
Programming buttons............................ 178
Re solving problems...............................1 80
Synchronising thero lling code..............1 79454
Index

On-board computer
Displaying the service due dat e............. 297
Head-up displ aymenu........................... 253
Multifunction displa y............................. 251
Ope rating.............................................. 250
Overview of menus................................ 250
On-board diagnostics in terface
see Diagnostics connection
On-board electronics Engine electronics................................. 353
Notes....................................................3 53
Tw o-w ayradios...................................... 353
Online services Data storage............................................ 36
Online services see In-Car Of fice
Open-source soft ware................................ 37
Opening the tailgate using your foot
HANDS-FREE ACCES S............................. 84
Operating fluids
Ad Blue ®
................................................ 362
Ad ditives (fuel)...................................... 360
Brake fluid............................................ .364 Coolant (engine).................................... 365
Engine oil.............................................
.363
Fu el (diesel)...........................................3 60
Fu el (petrol)........................................... 359
No tes..................................................... 357
Wi ndsc reen washer fluid.......................3 65
Operating saf ety
48 V on-boa rdelectrical sy stem.............. 24
Declaration of conformity (electro‐
magnetic compatibility)........................... 26
Declaration of conformity (ja ck).............. 29
Declaration of conformity (TIREFIT kit).... 30
Declaration of conformity (wireless
ve hicle components)...............................26
EQ Boo sttech nology............................... 24
Information..............................................24
Operating sy stem
see On-board computer
Optimised acceleration Activating.............................................. 15 6
Outside mir rors
Anti-dazzle mode (automatic)................ 14 0
Au tomatic mir rorfo lding function......... .141
Fo lding in/out...................................... .139 Operating
the memory function............ 108
Pa rking position..................................... 14 0
Setting................................................... 13 9
Overhead control panel Overview................................................. 14
Owner's Manual Vehicle equipment................................... 24
Owner's Manual (digital)............................ 20 P
Pa int code.................................................. 355
Pa intwork (cleaning instructions) ...........307
Pa rk position
Inserting................................................ 16 8
Selecting au tomatical ly......................... 16 8
Pa rking
see Electric parking brake
Pa rking aid
see Parking Assist PARKTRONIC
Pa rking Assist PARKTRONIC
Ac tivating.............................................. 231
Ad justing warning tones........................ 232
Deactivating.......................................... 231 Index
461