engine coolant MERCEDES-BENZ E-CLASS COUPE 2021 User Guide

W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
ï
Tr ailer tow hitch warning
lamp *T
hered trailer hitch warning lamp is lit.
The trailer hitch is not operational. &
W
WARNING
ARNING Risk of an accident if the ball neck is not loc ked
The trailer may become de tach ed. #
Stop theve hicle immediately in accordance with the tra1c conditions. Do not continue driving. #
Uncouple the trailer and secure it against rolling away. #
Initiate a new swivel mo vement and do not re-couple the trailer until thewa rning/indicator lamp goes out. #
Notethe messages on the instrument displa y.Engine
Engine
W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
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 Display message
s andwarning/indicator lamps
431
431

W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
R The engine coolant pump is faulty
If th ere is an additional warning tone, the coolant temp erature has exceeded 120°C. &
W
WARNING
ARNING Risk of burns when opening the bonnet
If yo u open the bonnet in theeve nt of an overheated engine or /re in the engine compartment, thefo llowing situa-
tions may occur:
R You may come into contact with hot gases.
R You may come into contact with other escaping hot operating 0uids. #
Before opening the bonnet, allow the engine tocool down. #
Intheev ent of a /re in the engine compartment, keep the bonnet closed and call the /re service. #
Stop immediately in accordance with the tra1c conditions and switch o. theve hicle. Do not continue driving. #
Notethe messages on the instrument displa y.
If t If t he coolant t
he coolant t em
emper
per atur
atur e displa
e displa y is at t
y is at the low
he lower end of t
er end of t he t
he tem
emper
per atur
atur e scale:
e scale: #
Consult a quali/ed specialist workshop.
If t
If t he coolant t he coolant t em
emper
per atur
atur e displa
e displa y is at t
y is at the upper end of t
he upper end of t he t
he tem
emper
per atur
atur e scale:
e scale: #
Exit theve hicle and keep a safe distance from it until the engine has cooled down. #
Check the coolant le vel (/ page 307). 432
432
Display message
s andwarning/indicator lamps

W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions #
Make sure that the air supply tothera diator is not obstructed. #
Avoiding high loads on the engine, drive tothe nearest quali/ed specialist workshop. In doing so, ensu rethat 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 battery cooling is faulty
R The radiator shutters are bloc ked or defective #
Avoiding high loads on the engine, drive tothe nearest quali/ed specialist workshop.
; Engine diagnosis warning
lamp *T
he yellow engine diagnostics warning lamp is lit while the engine is running.
A malfunction has occur red in the engine, theex haust system or the fuel system.
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 quali/ed specialist workshop.
V
V ehicles wit
ehicles wit h a diesel engine:
h a diesel engine: the fuel tank may ha vebeen run dr y. #
Start the engine thre eto four times aTer refuelling.
If th eye llow engine diagnosis warning lamp goes out, emer gency ope ration mode is cancelled. The vehicle need not
be checked. Display messages and
warning/indicator lamps
433
433

Re
sidual heat......................................... 146
Setting (MBUX multimedia system)......... 144
Setting the air distribution...................... 143
Setting the air0ow.................................. 143
Setting the climate style......................... 145
Setting the frag rance system.................. 146
Setting theve hicle interior temp era-
ture....................................................... 143
St ationary heater/ ventilation................. 148
Switching there ar wind owheater
on/o.................................................... 143
THERM ATIC cont rol panel...................... 143
THERMOTRONIC control panel............... 143
Ve ntilating theve hicle (con venience
opening).................................................. 88
Climat
Climat e s
e stytyle
le
Fu nction................................................ 145
Setting.................................................. .145
Co-dr
Co-dr iv
iver airbag
er airbag shut
shuto.
o.
see Automatic co-driver airbag shuto.
Coc
Coc kpit
kpit
Overview.................................................... 6
Co.ee
Co.ee cup symbol
cup symbol
see ATTENTION ASSIST Collision det
Collision det
ection (park
ection (parked v
ed vehicle)
ehicle)
Setting................................................... 183
Combination switch
Combination switch .................................... .128
Com
Com ponent-speci/c
ponent-speci/c inf
infor
ormation
mation................... 356
Com
Com put
puter
er
see On-board computer
Conv
Conv enience closing
enience closing...................................... 88
Conv
Conv enience opening
enience opening..................................... 88
Coolant (engine)
Coolant (engine) Levelch eck............................................ 307
No tes..................................................... 366
Cooling
Cooling
see Climate control
Cop
Cop yr
yright
ight....................................................... 38
Cor
Cor ner
nering light
ing light............................................. 129
Cr
Cr oss
oss tr
tra1c
a1c (w
(war
ar ning)
ning)
see Manoeuvring assis tance
Cr
Cr oss
oss Tr
Tra1c
a1c Alert
Alert........................................ 237
Cr
Cr osswind Assist
osswind Assist
Fu nction/no tes...................................... 188
Cr
Cr uise contr
uise contr ol
ol
Ac tivating............................................... 194 Buttons.................................................. 194
Calling up a speed................................. 194
Deactivating........................................... 194
Fu
nction................................................ 193
Re quirements:....................................... 194
Selecting............................................... 194
Setting a speed...................................... 194
St oring a speed...................................... 194
System limitations.................................. 193 D D
Dashboard
Dashboard see Cockpit
Dashcam
Dashcam Notes..................................................... 276
Selecting a USB device......................... .277
St arting/stopping a video recording...... .277
Dat
Dat a acq
a acq uisition
uisition
Ve hicle..................................................... 35
Dat
Dat a pr ot
a pr otection r
ection r ights
ights
Data storag e............................................ 38
Dat
Dat a st
a st or
orage
age
Data pr otection rights.............................. 38
Electronic control units............................ 35 Index
449
449

:
Automatic driving lights inoper-
ative...................................................... 377
Á Change key batteries .................... 375
J Check brake 0uid le vel.................. 396
5 Check eng. oil le v.when next
re fuelling ............................................... 425
ï Check trailer hitch lo ck(white
display message) .................................... 382
h Check tyre(s) ................................ 418
! Clean the fuel /lter....................... 388
ÿ Coolant Stop vehicle Switch
engine o............................................... 387
! currently una vailable See Own-
er's Manual............................................4 09
÷ currently una vailable See Own-
er's Manual............................................4 10
5 Engine oil le vel cannot be meas-
ured....................................................... 427
5 Engine oil le velRe duce oil le vel..... 426 5
Engine oil le velSt op vehicle
Switch engine o.................................... 426
5 Engine oil pressure Stop Switch
o. engine.............................................. 427
ä Fault Drive at max. 80 km/h ......... 407
6 Front leT malfunction Consult
wo rkshop (e xample)...............................3 72
_ Front leT seat backrest not
loc ked (e xamp le).................................... 385
& inoperative Battery low................. 381
& inoperative Refuel vehicle............. .381
& inoperative See Owner's Man........ 380
! inoperative See Owner's Manual.. .410
÷ inoperative See Owner's Manual.. .411
T inoperative See Owner's Manual.. .412
G Inoperative................................... 413
: Intelligent Light System inopera-
tive........................................................ 378
Á Key being initialised Please wait.... 376 Á
Key not de tected (red display
message).............................................. .376
Á Key not de tected (white display
message).............................................. .375
: LeT dipped beam (e xample).......... 377
6 LeT windowbag malfunction
Consult workshop (e xample).................. 372
¢ Lowe ring....................................... 408
: Malfunction See Owner's Man-
ual ......................................................... 377
ð Maximum speed exceeded ............ 400
Ø ................................................... .422
ç O.................................................3 99
ë O.................................................3 96
! Parking brake See Owner's
Manual..................................................3 92
É Please reduce speed .................... .408
Ý Please wait 48 V battery charg-
ing......................................................... 416
h Rectify tyre pressure ..................... 419 Index
451 451

Ø
Re/ll AdBlue See Owner ’sMan-
ual ......................................................... 422
! Release parking brake ...................395
¸ Replace air cleaner ....................... 389
Á Replace key.................................. 375
8 Reser vefuel le vel.......................... 388
6 Restraint sys. malfunction Con-
sult workshop ....................................... .372
# See Owner's Manual..................... 414
Ù Steering malfunction Increased
ph ysical e.ort See Owner's Manual....... 383
Ù Steering malfunction Stop
immediately See Owner's Manual ........... 384
# Stop vehicle Lea veengine run-
ning ....................................................... 415
# Stop vehicle See Owner's Man-
ual......................................................... 415
É Stop vehicle Vehicle too low .......... 407
ç suspended .................................... 398
: Switch o. lights............................ 378 :
Switch on headlamps .................... 378
á temp orarily una vailable Camera
view restric ted....................................... 406
¸ temp orarily una vailable Sensors
dirty....................................................... 405
Ø Top up AdBlue Emer gency op. in
XXX miles See Owner's Manual.............. 422
+ Top up coolant See Owner ’s
Manual.................................................. 387
¥ Top up washer 0uid...................... .386
! Turn on the ignition torelease
th e parking brake ................................... 395
d Vehicle is operational Switch o.
ignition before exiting............................. 381
É Vehicle rising Please wait.............. 408
É Vehicle rising ................................ 408
h Warning tyre defect....................... 419
h Wheel sensor(s) missing ................ 418Ø
XX,X l Top up AdBlue Swit chon
ignition, wait 60 sec. or eng. start not
poss...................................................... 423
Ac tive Blind Spot Assist cur rently
una vailable See Owner's Manual ............ 403
Ac tive Blind Spot Assist inoperative........ 404
Ac tive Blind Spot Assist not available
when towing a trailer See Owner's
Manual.................................................. 404
Ac tive bonnet malfunction See Own-
er's Manual............................................ 384
Ac tive Brake Assist Functions cur-
re ntly limi ted See Owner's Manual .........412
Ac tive Brake Assist Functions limited
See Owner's Manual.............................. 413
Ac tive Distance Assist available again ..... 400
Ac tive Distance Assist cur rently
una vailable See Owner's Manual ............ 399
Ac tive Distance Assist inoperative.......... 399 452 452
Index

Mo
Mo
ving away
ving away
see Driving tips
MUL
MUL TIBEAM LED
TIBEAM LED.......................................... 129
Multifunction st
Multifunction st eer
eering wheel
ing wheel
Overview of buttons............................... 250
Multifunction st
Multifunction st eer
eering wheel
ing wheel
see Steering wheel
Multimedia syst
Multimedia syst em
em
see MBUX multimedia system N
N
N
N a
avig
vig ation
ation
No tes..................................................... 270
Overview................................................ 271
Sh ow ing/hiding the menu...................... 270
Switching on.......................................... 270
Na
Na vig vigation
ation
see Destination entry
see Map
see Route
N N eutr
eutr al
al
Engaging................................................ 169 N
Noise
oise
Wheels and tyres................................... 337
Wheels/tyres......................................... 337 O O
Occupant safe
Occupant safe ty
ty
see Airbag
see Automatic co-driver airbag shuto.
see Child seat
see Pets in theve hicle
see PRE-SAFE ®
(anticipatory occu-
pant pr otection)
see PRE-SAFE ®
PLUS (anticipatory
occupant pr otection plus)
see Restraint system
see Seat belt
Oil
Oil
see Engine oil
On-boar On-boar d com
d comput
puter
er
Displa yingthe service due dat e.............. 302
Head-up display menu............................ 253
Instrument displa y................................. 252
Menu overview.......................................2 50
Operating.............................................. 250 On-boar
On-boar d diagnos d diagnostics int tics interf
erface
ace
see Diagnostics connection
On-boar
On-boar d electr
d electrical syst
ical syst em batt
em batter
ery (12 V)
y (12 V)
Charging................................................ 327
Re placing.............................................. .328
St arting assis tance............................... .327
On-boar On-boar d electr
d electronics
onics
Engine electronics................................. 354
No tes..................................................... 354
Tw o-w ayradios...................................... 354
Online ser Online ser vices
vices
Data storage............................................ 37
Online ser
Online ser vices
vices
see In-Car O1ce
Open-sour
Open-sour ce
cesoTw
soTw are
are.................................... 38
Opening t
Opening t he boo
he boo t lid using y
t lid using y our f
our foot
oot
HANDS-FREE ACCESS............................. 84
Oper
Oper ating
ating 0uids
0uids
Ad Blue ®
................................................ .363
Ad ditives (fuel)....................................... 361
Brake 0uid............................................. 366
Coolant (engine).................................... 366
Engine oil............................................... 364 Index
463 463

J
Brake system warning lamp (yel-
low)....................................................... 435
ÿ Coolant warning lamp (red)........... 431
ÿ Coolant warning lamp (yellow).......4 33
! Electric parking brake indicator
lamp (red).............................................. 435
# Electrical fault warning lam p......... 434
; Engine diagnosis warning lamp...... 433
å ESP®
OFF warning lam p................ 440
÷ ESP®
wa rning lamp 0ashes........... 439
÷ ESP®
wa rning lamp lights up......... 439
8 Fuelreser vewarning lamp lights
up.......................................................... 434
Ù Powe r steering warning lamp
(red)...................................................... 430
6 Restraint system warning lam p...... 429
ü Seat belt warning lamp 0ashes...... 429
ü Seat belt warning lamp lights up.... 430
ä Suspension warning lamp (yel-
low)....................................................... 438 !
The electric parking brake (yel-
low) indicator lam p................................. 435
ï Trailer tow hitch warning lam p....... 431
h Tyre pressure monitoring sys-
te m wa rning lamp 0ashes....................... 441
h Tyre pressure monitoring sys-
te m wa rning lamp lights up.................... 441
L Warning lamp for distance
wa rning function.................................... 437
Overview................................................ 427
PA SSENGER AIR BA G............................... 50
W
W arr arr anty
anty........................................................ 34
W
W asher
asher 0uid
0uid
see Windsc reen washer 0uid
W
W ashing b
ashing b y hand (car
y hand (car e)
e)................................ 311
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..................................... 275
W
W eb br ow
eb br owsers
sers
Overview................................................ 288 Wheel c
Wheel c
hange
hange
Fi tting a new wheel................................ 350
Lo we ring theve hicle.............................. 351
Preparation............................................ 347
Ra ising theve hicle................................. 348
Re moving a wheel................................. .350
Re moving//tting hub caps..................... 347
Wheel c Wheel c hange
hange
see Emer gency spa rewheel
Wheel rot
Wheel rotation
ation ............................................. 345
Wheels
Wheels Care..................................................... .312
Checking............................................... 337
Checking the tyre pressure (tyre pres-
sure monitoring system)......................... 340
Fi tting.................................................... 350
Flat tyre................................................. 318
Inter changing......................................... 345
MOExtended tyres................................. 318
Noise..................................................... 337
No tes on /tting...................................... 342
Re moving............................................... 350
Re placing...................................... .342, 347
Re placing the hub cap............................ 347 474 474
Index