engine coolant MERCEDES-BENZ E-CLASS COUPE 2020 User Guide

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
If th e trailer hitch is swivelling: #
Wait until the ball neck has reached the operational position.
Ù
Po we rst eering warning
lamp (red) The
red po werst eering sy stem warning lamp is lit while the engine is running.
*The po wer assi stance or thesteering itself is malfunctioning. &
WARNING Risk of accident if steering capability is impaired
If th esteering does not function as intended, theve hicle's operating saf ety is jeopardised. #
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions. Do
not continue driving under any circums tances. #
Consult a qualified specialist workshop. #
Notethe messages on the multifunction displa y.Engine
Wa
rning/indicator lamp
Possible causes/consequences and M MSolutions
ÿ Coolant warning lamp The
red coolant warning lamp is lit while the engine is running.
*Possible causes: R The temp erature sensor is malfunctioning 422
Display messages and warning/indicator lamps

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
R The coolant le vel is too low
R The air supply tothera diator is obstructed
R The radiator fan is faulty
If th ere is an additional warning tone, the coolant temp erature has exceeded 120 °C. &
WARNING 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.
If th e coolant temp erature display is at the lo wer end of thete mp erature scale: #
Consult a qualified specialist workshop.
or #
Exit theve hicle and keep a safe dis tance from it until the engine has cooled down. #
Check the coolant le vel (/ page 300). Display messages and
warning/indicator lamps 423

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions #
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 The
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.
#
Elect rical fault warning
lamp The
red elect rical fault warning lamp is lit.
*T here is a fault in the electrics. #
Notethe messages on the multifunction displa y.424
Display messages and warning/indicator lamps

Ac
tivating/deactivating the synchro‐
nisation function (MBUX multimedia
sy stem) ................................................ 14 3
Air-reci rculation mode ........................ .144
Au tomatic control ................................ 14 3
Calling up the air conditioning menu ... 14 2
Climate style function .......................... 14 3
Demi sting the windscreen ...................1 41
Demi sting windo ws............................. 14 4
Fr ont air vents ..................................... 14 9
Inserting/removing theflacon (fra‐
gr ance sy stem) .................................... 14 4
Ionisation ............................................. 14 4
No te ..................................................... 141
Re ar air vents ...................................... 15 0
Re sidual heat ....................................... 14 4
Setting (MBUX multimedia sy stem) ..... 14 2
Setting the air distribution ...................1 41
Setting the air flow ............................... 141
Setting the climate style ......................1 43
Setting the fragrance sy stem ............... 14 4
Setting thete mp erature ....................... 141
St ationary heater/ ventilation .............. 14 5
Switching on/off ................................. 14 2
Switching there ar wind owheater
on/off .................................................. 141THERMATIC contro
l panel .................... 141
THERMOTRONIC contro l panel ............141
Ve ntilating theve hicle (con venience
opening) ................................................ 85
Climate style
Fu nction .............................................. 14 3
Setting ................................................. 14 3
Cockpit ........................................................ .6
Overview .................................................6
Cof fee cup symbol
see ATTENTION ASSIST
Collision de tection (pa rked vehicle) ......181
Combination switch ................................12 5
Compu ter
see On-board computer
Consum ption indicator
Calling up ............................................ 16 6
Con venience closing ................................. 85
Con venience opening ................................ 85
Coolant (engine) Check le vel .......................................... 300
No tes .................................................. 359 Cooling
see Climate control
Co pyright ...................................................34
Cornering light ........................................ .126
Cross Traf fic Alert .................................. .226
Crosswind Assist Function/no tes .................................... 187
Cruise control .......................................... 19 3
Ac tivating ............................................ .194
Buttons ................................................ 194
Calling up a speed .............................. .194
Deactivating ........................................ 194
Fu nction .............................................. 19 3
Re quirements ...................................... 194
Selecting .............................................. 194
Setting a speed .................................... 194
St oring a speed .................................... 194
Sy stem limitations ...............................1 93 D
Dashboard see Cockpit Index
439

¯
AdBlue sy stem fault Emer‐
ge ncy op. in XXX miles See Owner's
Manual ................................................. 41 5
¯ AdBlue sy stem fault Engine
st art not possible ................................ .416
¯ AdBlue sy stem fault See Own‐
er's Manual .......................................... 41 5
5 Add 1 litre engine oil when
next refuelling ...................................... 417
é ATTENTION ASSIST inoperative
.............................................................3 96
é ATTENTION ASSIS T:Take a
break! .................................................. 396
: Automatic driving lights inoper‐
ative ..................................................... 371
Á Changekey bat teries ................. 369
J Check brake fluid le vel.............. .388
# Checkbrake pads See Owner's
Manual ................................................ 388 5
Check eng. oil le v.when next
re fuelling .............................................. 416
ï Check trailer hit chlock .............. 375
h Check tyre(s) .............................. 41 0
! Clean the fuel filter .................... .381
ÿ Coolant Stop vehicle Switch
engine off ............................................ 380
_ Currently una vailable Camera
view restricted ..................................... 400
ç Currently unavailable Radar
sensors dirty .......................................3 99
! currently una vailable See Own‐
er's Manual .......................................... 401
÷ currently una vailable See Own‐
er's Manual ........................................ .402
5 Engine oil le vel cannot be
measured ............................................ .418
5 Engine oil le velRe duce oil le vel.. 417
5 Engine oil le velSt op vehicle
Switch engine off ................................. 4175
Engine oil pressu reStop
Switch off engine ................................. 41 8
ä Fault Drive at max. 80 km/h ...... 393
6 Front left malfunction Consult
wo rkshop (e xample)............................ 366
_ Front left seat backrest not
loc ked (e xamp le)................................ .378
& inoperative Battery low ...............374
& inoperative Refuel vehicle ........... 374
& inoperative See Owner's Man. ....374
! inoperative See Owner's Man‐
ual ....................................................... 402
÷ inoperative See Owner's Man‐
ual ....................................................... 403
T inoperative See Owner's Man‐
ual ....................................................... 404
G Inoperati ve................................. 405
: Intelligent Light Sy stem inoper‐
ative ....................................................3 72 Index
441

Á
Key not de tected (red displ ay
messa ge).............................................3 70
Á Key not de tected (white displ ay
messa ge).............................................3 70
: Left dipped beam (e xamp le) ...... .371
6 Left windowbag malfunction
Consult workshop (e xample).............. .366
¢ Lowe ring .................................... 394
: Malfunction See Owner's Man‐
ual ....................................................... 371
ð Maximum speed exceeded ......... 391
Ø ................................................... 414
ç Off..............................................3 90
ë Off.............................................. 393
! Parking brake See Owner's
Manual ................................................ 384
É Please reduce speed .................. 395
Ý Please wait 48 V battery charg‐
ing ...................................................... .408
h Rectify tyre pressure ...................41 0Ø
Refill Ad Blue See Owne r’s
Manual .................................................4 13
! Release parking brake ................ 387
¸ Replace air cleaner .....................381
À Replace key See Owner's Man‐
ual ...................................................... .369
Á Replace key ................................ 369
8 Reser vefuel le vel...................... .381
6 Restra int sys. malfunction Con‐
sult workshop ...................................... 366
# See Owner's Manual .................. 406
Ù Steering malfunction Incre ased
ph ysical ef fort See Owner's Manual ....376
Ù Steering malfunction Stop
immediately See Owner's Manual .......377
# Stop vehicle Lea veengine run‐
ning ..................................................... 407
# Stop vehicle See Owner's Man‐
ual .......................................................4 07
É Stop vehicle Vehicle too low .......3 94 ç
suspended ................................. 390
: Switch off lights .........................3 72
: Switch on headlamps .................372
Ø Top up AdBlue Emergency op.
in XXX miles See Owner's Manual .......414
+ Top up coolant See Owner ’s
Manual ................................................ 379
¥ Top up washer fluid .................... 379
! Turn on the ignition torelease
th e parking brake ................................ 388
d Vehicle is operational Switch
off ignition before exiting .................... .375
É Vehicle rising Please wait.......... .395
É Vehicle rising .............................. 395
h Warning tyre defect .....................411
h Wheel sensor(s) missing ............ 409
Ø XX,X l Top up AdBlue Switch on
ignition, wait 60 sec. or eng. start
not poss. .............................................. 414442
Index

Ne
utral
Engaging .............................................. 167
Note s........................................................ 157
Optimised acceleration ........................ 157O
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 ®
PLUS (anticipatory
occupant pr otection plus)
see Restra int sy stem
see Seat belt
Oil see Engine oil
On-board computer ................................. 24 6
Displ aying the service due date ........... 295
Head-up display menu .........................2 49
Multifunction display ........................... 24 8
Operating ............................................ 24 6Overview of menus ..............................
24 6
On-board diagnostics inter face
see Diagno stics connection
On-boa rdelectronics
Engine electronics .............................. .347
No tes ................................................... 347
Tw o-w ayradios .................................... 347
Online services Data storage .......................................... 33
Online services see In-Car Of fice
Open-source so ftwa re .............................. 34
Opening the bo otlid using your foot
HANDS-FREE ACCESS .......................... .81
Operating fluids
Ad Blue ®
............................................... 356
Ad ditives (fuel) .................................... 354
Brake fluid .......................................... .359
Coolant (engine) .................................. 359
Engine oil ............................................. 357
Fu el (diesel) ......................................... 354
Fu el (petrol) ......................................... 353
No tes ................................................... 351 Wi
ndsc reen washer fluid .................... .360
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 ...........................157
Ac tivating ............................................ .157
Outside mir rors ............................... 137, 13 8
Anti-dazzle mode (automatic) .............. 13 8
Au tomatic mir rorfo lding function ........ 13 9
Fo lding in/out .................................... .137
Operating the memory function ........... 11 0
Pa rking position .................................. .138
Setting ................................................. 137
Overhead control panel Overview ................................................ 12454
Index

Ve
ntilation
see Climate cont rol
Ve nts
see Air vents
VIN ............................................................ 349
Identification plate .............................. 349
Seat ..................................................... 349
Wi ndsc reen ......................................... 349
Vi sion
Demisting windo ws............................. 14 4W
Wa rning lamps
see Warning/indicator lamps
Wa rning sy stem
see ATA (anti-theft alarm sy stem)
Wa rning triangle
Re moving ............................................ 309
Setting up ............................................ 310
Wa rning/indicator lamp
! ABSwarning lamp ...................... 428
J Brake sy stem warning lamp
(red) .................................................... 426 J
Brake sy stem warning lamp
(yellow) ................................................ 426
ÿ Coolant warning lamp ................ 422
! Electric parking brake indicator
lamp (red) ............................................ 425
# Electrical fault warning lamp ...... 424
; Engine diagnosis warning lamp .. 424
å ESP®
OFF warning lamp ............ .430
÷ ESP®
wa rning lamp flashes ........ 429
÷ ESP®
wa rning lamp lights up ...... 429
8 Fuelreser vewarning lamp
lights up .............................................. 425
Ù Powe rst eering warning lamp
(red) .................................................... 422
6 Restra int sy stem warning lamp .. 420
ü Seat belt warning lamp flashes .. 420
ü Seat belt warning lamp lights
up ........................................................ 421
ä Suspension warning lamp (yel‐
low) .................................................... .428 !
The electric parking brake (yel‐
low) indicator lamp .............................. 425
ï Trailer tow hit chwarning lamp .... 421
h Tyre pressure monitoring sys‐
te m wa rning lamp flashes .................... 431
h Tyre pressure monitoring sys‐
te m wa rning lamp lights up ................ .431
L Warning lamp for dis tance
wa rning function .................................. 427
Wa rning/indicator lamps ........................419
Overview ..............................................4 19
PA SSENGER AIR BAG ............................ .47
Wa rranty ..................................................... 31
Wa sher fluid
see Windsc reen washer fluid
Wa shing byhand (care) .......................... 304
Wa ter tank
see Air-water duct
We ather information ............................... 270
We b br owser
Overview ..............................................2 81464
Index