check engine MERCEDES-BENZ CLS COUPE 2020 User Guide

Display messages
Possible causes/consequences and M
MSolutions
T
!
÷ inoperative See Owner's
Manual *
EBD, ABS and ESP ®
are malfunctioning.
Other driving sy stems and driving saf ety sy stems (e.g. BAS) may also be malfunctioning. &
WARNING Risk of skidding if EBD, ABS and ESP ®
are malfunctioning
The wheels may block du ring braking and ESP ®
does not pe rform any vehicle stabilization.
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. Active Brake Assist Func-
tions currently limited See
Owner's Manual *
Ve hicles with the Driving Assistance Package: Active Brake Assi stwith cross-traf fic function, Evasi veSteering
Assist or PRE‑SAFE ®
PLUS are temp orarily una vailable or only partially available.
Ve hicles without the Driving Assistance Package: Active Brake Assi stistemp orarily una vailable. #
Drive on.
As soon as the ambient conditions are within the sy stem limits, the sy stem will become available again. #
Ifth e display message does not disappear, stop theve hicle in accordance with the tra ffic conditions and restart
th e engine. Display messages and
warning/indicator lamps 399

Display messages
Possible causes/consequences and M
MSolutions
5 Engine oil level Reduce oil
level *T
he engine oil le vel is too high.
* NO
TEEngine dama gecaused bydriving with excess engine oil #
Avoid long journe yswith excess engine oil. #
Consult a qualified specialist workshop immediately and ha vethe engine oil le velre duced.
5 Engine oil level Stop vehi-
cle Switch engine off *T
he engine oil le vel is too lo w.
* NO
TEEngine dama gecaused bydriving with insuf ficient engine oil #
Avoid long journe yswith insuf ficient engine oil. #
Stop theve hicle immediately in accordance with the traf fic conditions. Do not continue driving. #
Switch off the engine. #
Add 1 l of engine oil (/ page 296). #
Check the engine oil le vel.
No tes on engine oil (/ page 353).412
Displaymessa ges and warning/indicator lamps

Occupant saf
ety Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
6 Re stra int sy stem warning
lamp *T
he redre stra int sy stem warning lamp is lit while the engine is running.
The restra int sy stem is malfunctioning (/ page37). &
WA RNING Risk of inju rydue tomalfunctions in there stra int sy stem
Components in there stra int sy stem may be activated unintentionally or not deploy as intended in an accident. #
Have there stra int sy stem checked and repaired immediately at a qualified specialist workshop. #
Drive on carefully. #
Notethe messages on the multifunction displa y. #
Consult a qualified specialist workshop immediatel y.
ü
Seat belt warning lamp
fl ashes *T
he red seat belt warning lamp flashes and an intermit tent wa rning tone sounds.
The driver or front passenger has not fastened his/her seat belt while theve hicle is in motion. #
Fasten your seat belt (/ page 40).
There are objects on the front passenger seat. #
Remo vethe objects from the front passenger seat. Display messages and
warning/indicator lamps 415

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
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 297). #
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.
ÿ Coolant warning lamp (yel‐
low) *T
he yellow coolant warning lamp is lit while the engine is running.
Po ssible causes:
R The temp erature sensor is malfunctioning
R The charge air, transmission oil or bat tery cooling is faulty #
Avoiding high loads on the engine, drive tothe nearest qualified specialist workshop.
;
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 emergency 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. Displ
aymessa ges and warning/indicator lamps 419

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions #
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.
#
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. 420
Displaymessa ges and warning/indicator lamps

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. &
WA RNING 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 421

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions #
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 (/ page181). #
Adapt your driving style to suit thero ad and weather conditions.
÷ ESP ®
wa rning lamp lights
up *
The yellow ESP ®
wa rning lamp is lit while the engine is running.
ESP ®
is malfunctioning.
Other driving sy stems and driving saf ety sy stems (e.g. BAS) may also be malfunctioning. #
Notethe messages on the multifunction displa y. &
WA RNING Risk of skidding if ESP ®
is malfunctioning
If ESP ®
is malfunctioning, ESP ®
cannot car ryout vehicle stabilisation. In addition, other driving saf ety sy stems
are switched off. #
Drive on carefull y. #
Have ESP ®
ch ecked at a qualified specialist workshop. Display messages and
warning/indicator lamps 425

Ac
tivating/deactivating the synchro‐
nisation function (MBUX multimedia
sy stem) ................................................ 13 9
Air-reci rculation mode ........................ .140
Au tomatic control ................................ 13 9
Calling up the air conditioning menu ... 13 8
Climate style function .......................... 13 9
Demi sting the windscreen ...................1 37
Demi sting windo ws............................. 14 0
Fr ont air vents ..................................... 14 6
Inserting/removing theflacon (fra‐
gr ance sy stem) .................................... 141
Ionisation ............................................. 14 0
No te ..................................................... 137
Re ar air vents ....................................... 147
Re sidual heat ....................................... 14 0
Setting (MBUX multimedia sy stem) ..... 13 8
Setting the air distribution ...................1 37
Setting the air flow ............................... 137
Setting the climate style ......................1 39
Setting the fragrance sy stem ............... 14 0
Setting theve hicle interior temp era‐
ture ...................................................... 137
St ationary heater/ ventilation .............. 14 2
Switching on/off ................................. 13 8Switching
there ar wind owheater
on/off .................................................. 137
THERMATIC contro l panel .................... 137
THERMOTRONIC contro l panel ............137
Ve ntilating theve hicle (con venience
opening) ................................................ 85
Wi ndsc reen heating ............................. 14 2
Climate style
Fu nction .............................................. 13 9
Setting ................................................. 13 9
Cockpit ........................................................ .6
Overview .................................................6
Cof fee cup symbol
see ATTENTION ASSIST
Collision de tection (pa rked vehicle) ......17 7
Combination switch ................................12 2
Compu ter
see On-board computer
Consum ption indicator
Calling up ............................................ .161
Con venience closing ................................. 85
Con venience opening ................................ 85 Coolant (engine)
Check le vel .......................................... 297
No tes .................................................. 355
Cooling see Climate control
Co pyright ...................................................35
Cornering light ........................................ .123
Cross Traf fic Alert .................................. .234
Crosswind Assist Function/no tes ................................... 182
Cruise control .......................................... 187
Ac tivating ............................................ 188
Buttons ................................................ 188
Calling up a speed .............................. .188
Deactivating ........................................ 188
Fu nction .............................................. 187
Re quirements ...................................... 188
Selecting ............................................. 188
Setting a speed ................................... 188
St oring a speed ................................... 188
Sy stem limitations ...............................1 87 Index
435

¯
AdBlue sy stem fault Emer. op.:
max. XXX km/h Start not poss. in
XXX km ................................................ 41 0
¯ AdBlue sy stem fault Emer‐
ge ncy op. in XXX miles See Owner's
Manual ................................................. 41 0
¯ AdBlue sy stem fault Engine
st art not possible ................................ .411
¯ AdBlue sy stem fault See Own‐
er's Manual .......................................... 41 0
5 Add 1 litre engine oil when
next refuelling ...................................... 411
é ATTENTION ASSIST inoperative
.............................................................3 85
é ATTENTION ASSIS T:Take a
break! .................................................. 385
: Automatic driving lights inoper‐
ative .................................................... 366
Á Change key bat teries .................. 364
J Check brake fluid le vel.............. .383 #
Checkbrake pads See Owner's
Manual ................................................ 384
ï Check trailer hitch lock ..............371
h Check tyre(s) .............................. 405
! Clean the fuel filter .................... .376
ÿ Coolant Stop vehicle Switch
engine off ............................................ 375
_ Currently una vailable Camera
view restricted ..................................... 393
ç Currently unavailable Radar
sensors dirty .......................................3 92
! currently una vailable See Own‐
er's Manual ........................................ .396
÷ currently una vailable See Own‐
er's Manual ........................................ .397
5 Engine oil le vel cannot be
measured ............................................ .413
5 Engine oil le velRe duce oil le vel.. 412
5 Engine oil le velSt op vehicle
Switch engine off ................................. 4125
Engine oil pressu reStop
Switch off engine ................................. 413
ä Fault Drive at max. 80 km/h ...... 394
6 Front left malfunction Consult
wo rkshop (e xample)............................ .361
& inoperative Battery low .............. 369
& inoperative Refuel vehicle ..........3 69
& inoperative See Owner's Man. ... 369
! inoperative See Owner's Man‐
ual ....................................................... 397
÷ inoperative See Owner's Man‐
ual ....................................................... 398
T inoperative See Owner's Man‐
ual ....................................................... 399
G Inoperati ve................................. 400
: Intelligent Light Sy stem inoper‐
ative ....................................................3 67
Á Key not de tected (red displ ay
messa ge).............................................3 65 Index
437

Check tyre pressures
then restart
Ru n Flat Indicator ................................ 408
Cruise control and Limiter inope ra‐
tive ...................................................... 385
Cruise control inope rative ................... 385
Cruise control off ................................ 386
Fr ont-passenger airbag disabled See
Owner's Manual ..................................3 62
Fr ont-passenger airbag enabled See
Owner's Manual ..................................3 62
Hazard warning lamps malfunction‐
ing ...................................................... .368
Limi ter inoperative .............................. 386
Limiter passive ................................... .386
Mercedes me connect Services limi‐
te d See Owner's Manual .....................400
Mo tor can be star ted again .................4 03
N permanently active Risk of vehicle
ro lling .................................................. 378Only select
Park (P) when vehicle is
st ationary ............................................ 377
Place theke y in the mar ked space
See Owner's Manual ...........................365
PRE-SAFE impulse side inope rative
See Owner's Manual ........................... 363
PRE-SAFE inope rative See Owner's
Manual ................................................ 363
Re duce speed ...................................... 407
Re versing not poss. Consult work‐
shop ....................................................3 79
Risk of vehicle rolling Driver door
open and transmission not in P ...........378
Ru n Flat Indicator inope rative ............. 408
Speed limit (winter tyres) XXX km/h ... 388
Speed Limit Assi stcur rently una vail‐
able See Owner's Manual .................... 387
Speed Limit Assist inope rative ........... .387
St op vehicle Lea veengine running
Wa itTransmission cooling ...................379 To
shift out of P or N,depress brake
and start engine .................................. 377
To switch off the engine, press the
St art/ Stop button for at least 3 sec‐
onds or 3 times. .................................. 375
Tr af fic Sign Assi stcur rently una vaila‐
ble See Owner's Manual ...................... 390
Tr af fic Sign Assi stinope rative ............. 390
Tr ansmission Malfunction Stop ........... 379
Ty re press. monitor cur rently una vail‐
able .................................................... .404
Ty re press. monitor inoperative ...........404
Ty re press. monitor inoperative No
wheel sensors .................................... .404
Ty re pressure Check tyres ...................407
Ty re(s) ove rheated ...............................4 06
Wi thout changing gear, consult work‐
shop ....................................................3 78
Display on the windscreen
see Head-up display 440
Index