2021 MERCEDES-BENZ CLA COUPE fuel pressure

R
if operating conditions change, e.g. o.-
ro ad driving #
Adjust the tyre pressure, if necessar y.Ty
re pressure which is too high or too low can:
R Shor tenth e service life of the tyres.
R Cause increased tyre damage.
R Adve rsely a.ect driving characteristics and
th us driving saf ety, e.g. due toaquaplaning. &
W
WARNING
ARNING Risk of accident due torepea-
te d pressure drop in the tyres
The wheels, valves or tyres could be damaged.
To o low a tyre pressure can lead tothe tyres
bursting. #
Examine the tyres forfo re ign objects. #
Check whe ther the tyre has a puncture
or theva lve has a leak. #
Ifyo u are unable torectify the damage,
contact a quali/ed specialist workshop. Information on
there commended tyre pressure
fo rth eve hicle's factor y-/tted tyres can be found
on the tyre pressure table on the inside of the fuel
/ller 0ap (/ page 367).
Use a suitable pressure gauge tocheck the tyre
pressure. The outer appearance of a tyre does not
permit any reliable conclusion about the tyre pres-
sure.
Only cor rect tyre pressures when the tyres are
cold. Conditions for cold tyres:
R The vehicle has been par ked with the tyres out
of direct sunlight for at least thre e hours.
R The vehicle has tr avelled less than 1.6 km.
The vehicle's tyres heat up when driving. As the
te mp erature of the tyres increases, so too does
th e tyre pressure.
V
V ehicles wit ehicles wit h a tyr
h a tyre pr
e pr essur
essur e monit
e monit or
oring syst
ing syst em:
em:
yo u can also check the tyre pressure using the
on-board computer.
Not Not es on tr
es on tr ailer oper
ailer oper ation
ation
Alw ays in0ate there ar axle tyres tothere com-
mended tyre pressures on the tyre pressure table
fo r increased load. T
T
yr
yr e pr
e pr essur
essur e t
e table
able The tyre pressure
table is on the inside of the fuel
/ller 0ap. The tyre pressure
table sho ws there commended
tyre pressure for all tyres appr ovedfo rth is vehi-
cle. The recommended tyre pressures apply for
cold tyres under various operating conditions, i.e.
loading and/or speed of theve hicle. Wheels and tyres
367
367

If one or more tyre sizes precede a tyre pressure,
th efo llowing tyre pressure information is only
va lid forth ose tyre sizes and their respecti veload
condition.
If th e preceding tyre sizes are complemented by
th e+ symbol, the tyre pressure information
fo llowing sho wsalternative tyre pressures. Fuel
consum ption may then increase slightl y.
The load conditions "pa rtially laden" and "fully
laden" are de/ned in theta ble for di.erent num-
bers of passengers and amounts of luggage. The
actual number of seats may di.er from this. T T
yr
yr e pr
e pr essur
essur e monit
e monit or
oring syst
ing syst em
em F
F
unction of t
unction of t he tyr
he tyre pr
e pressur
essur e monit
e monit or
oring syst
ing syst em
em
The system checks the tyre pressure and the tyre
te mp erature of the tyres /t tedtotheve hicle by
means of a tyre pressure sensor.
The tyre pressure and the tyre temp erature
appear in the on-board computer (/ page 368).
If th ere is a substantial pressure loss or if the tyre
te mp erature is excessive, you will be warned with
display messages (/ page 459) ortheh wa
rning lamp in the inst rument cluster
(/ page 483).
The tyre pressure monitoring system is only an
aid. It is the driver's responsibility toset the tyre
pressure tothere commended cold tyre pressure
suitable forth e operating situation.
In most cases, the tyre pressure monitoring sys-
te m will automatically update the new refere nce
va lues aTer you ha vechanged the tyre pressure.
Yo u can, ho wever, also update there fere nce val-
ues byrestarting the tyre pressure monitoring
system manually (/ page 369).
Syst
Syst em limits em limits
The system may be impaired or may not function
particular lyin thefo llowing situations:
R incor rect refere nce values were ta ught in
R sudden pressure loss caused byafo re ign
object penetrating the tyre, forex ample
R there is a malfunction caused byano ther radio
signal source Chec
Chec king t
king t he tyr
he tyr e pr
e pressur
essur e wit
e with t
h the tyr
he tyr e pr
e pressure
essure
monit
monit or
oring sy
ing sy st
stem
em
R
R eq
eq uir
uir ements:
ements:
R The vehicle is switched on.
On-board computer: 4 Service 5
Tyres
One of thefo llowing displa ysappears:
R Current tyre pressure and tyre temp erature of
th e individual wheels: R
Tyre pressures will be displayed after a few
minutes of driving 368 368
Wheels and tyres

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
6
Please wait Depressurising
tank *V
Vehicles wit ehicles wit h pe
h petr
trol engines:
ol engines: the pressure in the fuel tank is reduced before the fuel /ller 0ap is opened. The pressure
re duction can take up to15 minutes.
6 Tank is depressurised
Ready for refuelling *V
Vehicles wit ehicles wit h pe
h petr
trol engines:
ol engines: the pressure in the fuel tank is released and the fuel /ller 0ap opens.
6
Tank ventilation Malfunc-
tion Consult workshop *V
Vehicles wit ehicles wit h pe
h petr
trol engines:
ol engines: There is a malfunction in the fuel system. #
Consult a quali/ed specialist workshop. Displ
aymessages and warning/indicator lamps
421
421

A
A
ctiv
ctiv e P
e Par
arking Assist
king Assist
Exiting a parking space.......................... 262
Fu nction................................................ 259
Pa rking.................................................. 260
System limitations..................................2 59
A
A ctiv
ctiv e Ser
e Ser vice Sy
vice Sy st
stem PL
em PL US
US
see ASS YST PLUS
A A ctiv ctiv e Speed Limit Assist
e Speed Limit Assist
Display................................................... 230
Fu nction................................................ 230
A
A ctiv
ctiv eSt
e St eer
eer ing Assist
ing Assist
Ac tivating/deactivating.......................... 234
Ac tive Emer gency Stop Assist................ 234
Fu nction................................................ 232
System limits......................................... 232
A
A dap
dap tiv
tive br
e br ak
ake lights
e lights .................................... 220
A
A dap
dap tiv
tive cr
e cr uise contr
uise contr ol
ol
see Active Distance Assist DISTRONIC
A
A dap
dap tiv
tive Highbeam Assist
e Highbeam Assist
Ac tivating/deactivating.......................... 136
Fu nction................................................ 135
A
A dap
dap tiv
tive Highbeam Assis
e Highbeam Assist Plus t Plus
Fu nction................................................ 136
Switching on/o..................................... 137 A
A dBlue
dBlue ®
®
Ad ditives................................................ 392
Capacity................................................ 393
No tes..................................................... 186
Purit y.................................................... .392
To pping up............................................ .186
A
A dditional door lock dditional door lock ....................................... 85
A
A dditiv
dditiv es
es
Ad Blue ®
................................................ .392
Engine oil............................................... 393
Fu el....................................................... 390
A
A dditiv
dditiv es (A
es (AdBlue
dBlue ®
®
)
)
see AdBlue ®
A
A dditiv
dditiv es (engine oil)
es (engine oil)
see Additives
A
A dditiv
dditiv es (fuel)
es (fuel)
see Fuel
A
A djus
djus ting t
ting t he headlam
he headlam p r
p range
ange ...................... 131
ATer
ATer -sales
-sales ser
service
vice
see ASS YST PLUS
Air conditioning menu
Air conditioning menu Calling up.............................................. 148 Air dis
Air distr
tribution
ibution
Setting................................................... 147
Setting (MBUX multimedia system)......... 149
Air inlet
Air inlet see Air-water duct
Air pr
Air pr essure
essure
see Tyre pressure
Air v
Air v ents
ents
Ad justing (front)..................................... 154
Ad justing (rear)...................................... 155
Air v
Air v ents
ents
see Air vents
Air
Air -conditioning syst
-conditioning syst em
em
see Climate cont rol
Air
Air -r
-recir
ecir culation mode (wit
culation mode (wit h
h/ne
/ne
par
par ticle
ticle pr
pre/lt
e/lt er)
er).......................................... 149
Air
Air -w
-wat
ater duct
er duct
Ke eping free.......................................... 334
Airbag
Airbag
Activation................................................ 47
Fr ont airbag (driver, front passenger)........ 53
Installation locations................................ 53
Knee airbag............................................. 53 486 486
Index

Displa
Displa
y messag
y messag es
es
ç - - - km/h..................................... 442
È - - - km/h..................................... 442
h - - - km/h..................................... 441
# 12 V battery See Owner's Man-
ual......................................................... 457
ò Acoustic presence indicator
inoperative............................................ .416
: Active Light System inoperative..... 410
¯ AdBlue system fault Emer. op.:
max. XXX km/h Start not poss. in
XXX km.................................................. 466
¯ AdBlue system fault Emer gency
op. in XXX miles See Owner's Manual.... 465
¯ AdBlue system fault Engine
start not possible................................... 466
¯ AdBlue system fault See Own-
er's Manual............................................ 465
5 Add 1 litre engine oil when next
re fuelling ............................................... 467 é
ATTENTION ASSIST inoperati ve..... 441
é ATTENTION ASSIS T:Take a
break!.................................................... 441
: Automatic driving lights inoper-
ative...................................................... 410
Û Battery overheated Stop, every-
body out! Outdoors if possible ................ 418
û Before starting the engine, turn
th e steering wheel.................................. 425
J Brake immediately ........................ 439
Á Change key batteries .................... 407
è Charger cable connected .............. 416
J Check brake 0uid le vel.................. 440
ï Check trailer hitch lock (white
display message) .................................... 422
h Check tyre(s) ................................ 460
! Clean the fuel /lter....................... 430
ÿ Coolant Stop vehicle Switch
engine o............................................... 429 !
currently una vailable See Own-
er's Manual............................................4 52
÷ currently una vailable See Own-
er's Manual............................................4 53
5 Engine oil le vel cannot be meas-
ured....................................................... 468
5 Engine oil le velRe duce oil le vel..... 467
5 Engine oil le velSt op vehicle
Switch engine o.................................... 467
5 Engine oil pressure Stop Switch
o. engine.............................................. 468
ä Fault Drive at max. 80 km/h ......... 451
6 Front leT malfunction Consult
wo rkshop (e xample)...............................4 04
& inoperative Battery low................. 413
& inoperative Char geHV battery...... 414
& inoperati veHigh-voltage battery
ch arging inco mplete ............................... 414
& inoperative Refuel vehicle............. .414
& inoperative See Owner's Man........ 413 Index
493 493

!
inoperative See Owner's Manual... 453
÷ inoperative See Owner's Manual... 454
T inoperative See Owner's Manual... 455
G Inoperative................................... 456
: Intelligent Light System inopera-
tive........................................................ 411
Á Key being initialised Please wait.... 408
Á Key not de tected (red display
message).............................................. .408
Á Key not de tected (white display
message).............................................. .408
: LeT dipped beam (e xample).......... 409
6 LeT windowbag malfunction
Consult workshop (e xample).................. 405
: Malfunction See Owner's Man-
ual.........................................................4 10
Û Malfunction Visit workshop ........... 419
d Malfunction.................................. 420
Û Malfunction.................................. 419
ð Maximum speed exceeded ............ 444 ç
O................................................. 443
ë O................................................. 440
! Parking brake See Owner's
Manual..................................................4 36
d Performance se verely limited........ 420
6 Please wait Depressurising tank .... 421
& Pre-entry clima tecont rol (via
ke y) available again aTer engine start..... 415
& Pre-ent ryclimate cont rol (via
ke y) inoperati veHV-battery low .............. 415
h Rectify tyre pressure ..................... 461
Ú Re/ll AdBlue See Owner ’sMan-
ual ......................................................... 464
! Release parking brake ...................438
¸ Replace air cleaner ....................... 430
Á Replace key.................................. 407
æ Reser vefuel le vel.......................... 430
6 Restraint sys. malfunction Con-
sult workshop ....................................... .403
# See Owner's Manual..................... 457 Ù
Steering malfunction Increased
ph ysical e.ort See Owner's Manual.......4 24
Ù Steering malfunction See Own-
er's Manual ............................................ 425
Ù Steering malfunction Stop
immediately See Owner's Manual ........... 424
d Stop Switch engine o.................. .420
# Stop vehicle Lea veengine run-
ning ....................................................... 459
# Stop vehicle See Owner's Man-
ual......................................................... 458
ç suspended .................................... 442
: Switch o. lights............................ 411
: Switch on headlamps .................... 411
6 Tank is dep ressurised Ready for
re fuelling ............................................... 421
6 Tank ventilation Malfunction
Consult workshop ................................. .421
á temp orarily una vailable Camera
view restric ted....................................... 450 494
494
Index

W
W
ar
ar ning syst
ning syst em
em
see ATA (anti-theT alarm system)
W
W ar
ar ning tr
ning tr iangle
iangle
Re moving............................................... 343
Setting up.............................................. 344
W
W ar
ar ning/indicat
ning/indicat or lamp
or lamp
! ABSwarning lamp......................... 481
Ó Active Brake Assist warning lam p..4 80
J Brake system warning lamp (red)... 479
J Brake system warning lamp (yel-
low)....................................................... 478
ÿ Coolant warning lamp (red)........... 474
ÿ Coolant warning lamp (yellow).......4 76
! Electric parking brake indicator
lamp (red).............................................. 478
# Electrical fault warning lamp
...................................................... 473, 477
; Engine diagnosis warning lamp...... 476
å ESP®
OFF warning lam p................ 482
÷ ESP®
wa rning lamp 0ashes........... 481 ÷
ESP®
wa rning lamp lights up......... 482
æ Fuelreser vewarning lamp lights
up.......................................................... 477
Ù Powe r steering warning lamp
(red)...................................................... 473
_ Reduced warning lamp po wer....... 472
6 Restraint system warning lam p...... 470
ü Seat belt warning lamp 0ashes...... 471
ü Seat belt warning lamp lights up.... 472
Ú System er rorwa rning lam p........... 472
! The electric parking brake (yel-
low) indica tor lam p................................. 478
ï Trailer tow hitch warning lam p....... 474
h Tyre pressure monitoring sys-
te m wa rning lamp 0ashes....................... 483
h Tyre pressure monitoring sys-
te m wa rning lamp lights up.................... 484
L Warning lamp for distance
wa rning function.................................... 480
Overview................................................ 469 PA
SSENGER AIR BA G............................... 57
W W arr
arr anty
anty........................................................ 41
W
W ashing b
ashing b y hand (car
y hand (car e)
e)................................ 337
W
W at
at er t
er t ank
ank
see Air-water duct
W
W eat
eat her inf
her inf or
ormation
mation..................................... 299
W
W eb br ow
eb br owsers
sers
Overview................................................ 312
Wheel c
Wheel c hange
hange
Fi tting a new wheel................................ 379
Lo we ring theve hicle.............................. 379
Preparation............................................ 375
Ra ising theve hicle................................. 376
Re moving a wheel................................. .378
Re moving//tting hub caps..................... 375
Wheel c
Wheel c hange
hange
see Emer gency spa rewheel
Wheel rot
Wheel rotation
ation ............................................. 373
Wheels
Wheels Care...................................................... 339
Chec king............................................... 365
Checking the tyre pressure (tyre pres-
sure monitoring system)......................... 368 518
518
Index