2020 MERCEDES-BENZ CLS COUPE engine coolant

Instrument display
Depending on
the display setting, the positions
of the indicator lamps on the instrument display
may dif fer from theex ample shown.
Indicator and warning lamps:
6 Re
stra int sy stem (/ page415)
ü Seat belt (/
page415)
ï Trailer hit ch (/page 416)
Ù Powe rst eering (/ page416)
ÿ Coolanttemp erature (/ page418)
; Engine diagnostics (/
page 418)
% Preglow #
Electrical
fault (/ page418)
8 Re
ser vefuel with fuel filler flap loca‐
tion indicator (/ page418)
! Electric pa
rking brake (red)
(/ page 421)
! Electric parking brake (yellow)
(/
page 421)
J Brakes (yellow) (/
page 421)
J Brakes (red) (/
page 421)
L Distance warning (/ page 423)
ä AIRBODY CONTROL (/ page 423)
ä DYNA MIC BODY CONTROL
(/ page 423)
! ABS (/
page 424)
÷ ESP®
(/ page 424)
å ESP®
OFF (/ page 424)
h Ty
re pressure monitoring sy stem
(/ page 427)
T St
anding lights (/ page120)
L Low beam (
/page 120)
K High beam (/
page122) #!
Tu
rn signal lights (/ page122)
R Re
ar fog light (/ page120) 414
Displaymessa ges and warning/indicator lamps

Engine
Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
ÿ Coolant warning lamp (red) *T
he red coolant warning lamp is lit while the engine is running.
Po ssible causes:
R The temp erature sensor is malfunctioning
R The coolant le vel is too low
R The air supply tothera diator is obstructed
R The radiator fan is faulty
R The engine coolant pump is faulty
If th ere is an additional warning tone, the coolant temp erature has exceeded 120°C. &
WA RNING Danger of bu rns when opening the bonn et
If yo u open the engine bonn etwhen the engine has overheated or during a fire inthe engine compartment, you
could come into contact wi thhot gases or other escaping operating fluids. #
Before opening the bonn et, allow the engine tocool down. #
Intheeve nt of a fire inthe engine compartment, keep the engine bonn etclosed and call thefire service. #
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.41 8
Displaymessa ges and warning/indicator lamps

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

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

Á
Key not de tected (white displ ay
messa ge).............................................3 64
: Left dipped beam (e xamp le) ...... .366
6 Left wind owbag malfunction
Consult workshop (e xample)................ 361
¢ Lowe ring .................................... 395
: Malfunction See Owner's Man‐
ual ....................................................... 366
ð Maximum speed exceeded ......... 388
Ø ................................................... 409
ç Off..............................................3 87
ë Off..............................................3 84
ï Operation only possible in
transmission position P .......................370
! Parking brake See Owner's
Manual ................................................ 380
É Please reduce speed .................. 395
Ý Please wait 48 V battery charg‐
ing ...................................................... .403 _
Rear left seat backrest not
loc ked (Example) .................................3 74
h Rectify tyre pressure .................. 405
Ø Refill Ad Blue See Owne r’s
Manual ................................................ 408
! Release parking brake ................ 383
¸ Replace air cleaner .....................377
Á Replace key ................................ 364
8 Reser vefuel le vel...................... .376
6 Restra int sys. malfunction Con‐
sult workshop ...................................... 361
# See Owner's Manual .................. 401
Ù Steering malfunction Incre ased
ph ysical ef fort See Owner's Manual ....372
Ù Steering malfunction Stop
immediately See Owner's Manual .......372
# Stop vehicle Lea veengine run‐
ning ..................................................... 402
# Stop vehicle See Owner's Man‐
ual .......................................................4 02É
Stop vehicle Vehicle too low .......3 94
ç suspended ................................. 386
: Switch off lights .........................3 67
: Switch on headlamps ................. 367
Ø Top up AdBlue Emergency op.
in XXX miles See Owner's Manual ....... 409
+ Top up coolant See Owner ’s
Manual ................................................ 375
¥ Top up washer fluid .................... .374
ï Trailer coupling extending… ........370
! Turn on the ignition torelease
th e parking brake ................................ 383
d Vehicle is operational Switch
off ignition before exiting .................... 370
É Vehicle rising Please wait.......... .395
É Vehicle rising .............................. 395
h Warning tyre defect .................... 406
h Wheel sensor(s) missing ............ 404438
Index

Ne
utral
Engaging .............................................. 16 2O
Occupant saf ety
see Airbag
see Automatic front passenger front
airbag shutoff
see Pets in theve hicle
see PRE-SAFE ®
(anticipatory occu‐
pant pr otection)
see PRE-SAFE ®
Impulse Side
see PRE-SAFE ®
PLUS (anticipatory
occupant pr otection plus)
see Restra int sy stem
see Seat belt
Oil see Engine oil
On-board computer ................................. 24 5
Displ aying the service due date ........... 292
Head-up display menu .........................2 48
Multifunction display ........................... 247
Operating ............................................ 24 5
Overview of menus .............................. 24 5On-board diagnostics inter
face
see Diagno stics connection
On-boa rdelectronics
Engine electronics .............................. .343
No tes .................................................. 343
Tw o-w ayradios .................................... 343
Online services Data storage .......................................... 34
Online services see In-Car Of fice
Open-source so ftwa re .............................. 35
Opening the bo otlid using your foot
HANDS-FREE ACCESS .......................... .81
Operating fluids
Ad Blue ®
............................................... 352
Ad ditives (fuel) .................................... 350
Brake fluid .......................................... .354
Coolant (engine) .................................. 355
Engine oil ............................................ 353
Fu el (diesel) ......................................... 350
Fu el (petrol) ......................................... 349
No tes ................................................... 347
Wi ndsc reen washer fluid .................... .355 Operating saf
ety
48 V on-boa rdelectrical sy stem ............ 22
Declaration of confo rmity (elect ro‐
magnetic compatibility) ......................... 24
Declaration of conformity (ja ck) ............ 27
Declaration of conformity (TIREFIT kit) .. 28
Declaration of conformity (wireless
ve hicle components) ............................. 24
EQ Boo st............................................... 22
Information ............................................ 22
Ope rating sy stem
see On-board computer
Optimised acceleration ...........................152
Ac tivating ............................................ 15 2
Outside mir rors ............................... 132, 13 3
Anti-dazzle mode (automatic) .............. 13 3
Au tomatic mir rorfo lding function ........ 13 5
Fo lding in/out .................................... .132
Operating the memory function ..........1 06
Pa rking position .................................. .134
Setting ................................................. 13 2
Overhead control panel Overview ................................................ 12450
Index

Ve
hicle maintenance
see ASS YST PLUS
Ve hicle tool kit ........................................ .310
TIREFIT kit ............................................ 310
To wing eye .......................................... 323
Ve ntilating
Con venience opening ............................ 85
Ve ntilation
see Climate cont rol
Ve nts
see Air vents
VIN ............................................................ 345
Identification plate .............................. 345
Seat ..................................................... 345
Wi ndsc reen ......................................... 345
Vi sion
Demisting windo ws............................. 14 0
Wi ndsc reen heating ............................. 14 2W
Wa rning lamps
see Warning/indicator lamps Wa
rning sy stem
see ATA (anti-theft alarm sy stem)
Wa rning triangle
Re moving ............................................ 306
Setting up ............................................ 307
Wa rning/indicator lamp
! ABSwarning lamp ...................... 424
æ Active Brake Assi stwa rning
lamp .................................................... 423
J Brake sy stem warning lamp
(red) .................................................... 422
J Brake sy stem warning lamp
(yellow) ................................................ 421
ÿ Coolant warning lamp (red) ........ .418
ÿ Coolant warning lamp (yellow) .... 419
! Electric pa rking brake indicator
lamp (red) ............................................ 421
# Electrical fault warning lamp ...... 420
; Engine diagnosis warning lamp .. .419
å ESP®
OFF warning lamp ............ .426
÷ ESP®
wa rning lamp flashes ........ 425 ÷
ESP®
wa rning lamp lights up ...... 425
8 Fuelreser vewarning lamp
lights up .............................................. 420
Ù Powe rst eering warning lamp
(red) .................................................... .416
6 Restra int sy stem warning lamp .. .415
ü Seat belt warning lamp flashes .. .415
ü Seat belt warning lamp lights
up ........................................................ 416
ä Suspension warning lamp (yel‐
low) .................................................... .424
! The electric parking brake (yel‐
low) indicator lamp .............................. 421
ï Trailer tow hit chwarning lamp .... 417
h Tyre pressure monitoring sys‐
te m wa rning lamp flashes .................. .427
h Tyre pressure monitoring sys‐
te m wa rning lamp lights up ................ .427
L Warning lamp for dis tance
wa rning function ................................ .423 460
Index