2020 MERCEDES-BENZ E-CLASS SALOON engine coolant

Display messages
Possible causes/consequences and M
MSolutions
5 Engine oil level cannot be
measured *T
he electrical connection tothe oil le vel sensor has been inter rupte d or the oil le vel sensor is faulty. #
Consult a qualified specialist workshop. Wa
rning and indicator lamps Overview of indicator and
warning lamps Some sy
stems will per form a self-test when the
ignition is switched on. Some indicator and
wa rning lamps may briefly light up or flash. This
behaviour is non-critical. These indicator and
wa rning lamps indicate a malfunction only if they
light up or flash af terth e engine has been star‐
te d or during a journe y. 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 (/ page 426)
ü Seat belt (/
page 426)
ï Trailer hit ch (/page 427)
Ù Powe rst eering (/ page 427)
ÿ Coolanttemp erature (/ page 428)
; Engine diagnostics (/
page 428)
% Preglow
# Elect
rical fault (/ page 428)
8 Re
ser vefuel with fuel filler flap loca‐
tion indicator (/ page 428)
! Elect
ric pa rking brake (red)
(/ page 431) 424
Display messages and warning/indicator lamps

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 428
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 305). Display messages and
warning/indicator lamps 429

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.430
Display messages and warning/indicator lamps

Ac
tivating/deactivating the synchro‐
nisation function (cont rol panel) .......... 14 5
Ac tivating/deactivating the synchro‐
nisation function (MBUX multimedia
sy stem) ................................................ 14 6
Air-reci rculation mode ........................ .146
Au tomatic control ................................ 14 5
Calling up the air conditioning menu ... 14 4
Climate style function .......................... 14 5
Demi sting the windscreen ...................1 43
Demisting wind ows............................. 14 6
Fr ont air vents ..................................... 15 2
Glo vebox air vent ................................ 15 3
Inserting/removing theflacon (fra‐
gr ance sy stem) .................................... 147
Ionisation ............................................. 14 6
No te .................................................... 14 3
Re ar air vents ...................................... 15 3
Re sidual heat ....................................... 14 6
Setting (MBUX multimedia sy stem) ..... 14 4
Setting the air distribution ...................1 43
Setting the air flow ............................... 14 3
Setting the climate style ......................1 45
Setting the fragrance sy stem ............... 14 6
Setting thete mp erature ......................1 43
St ationary heater/ ventilation .............. 14 8Switching on/off .................................
14 4
Switching there ar wind owheater
on/off .................................................1 43
THERMATIC control panel .................... 14 3
THERMOTRONIC contro l panel ............14 3
Ve ntilating theve hicle (con venience
opening) ................................................ 86
Wi ndsc reen heating ............................. 14 8
Climate style
Fu nction .............................................. 14 5
Setting ................................................. 14 5
Cockpit ........................................................ .6
Overview .................................................6
Cof fee cup symbol
see ATTENTION ASSIST
Collision de tection (pa rked vehicle) ......184
Combination switch ................................12 8
Compu ter
see On-board computer
Consum ption indicator
Calling up ............................................ 16 8
Con venience closing ................................. 86
Con venience opening ................................ 86 Coolant (engine)
Check le vel .......................................... 305
No tes .................................................. 363
Cooling see Climate control
Co pyright ...................................................34
Cornering light ........................................ .129
Cross Traf fic Alert .................................. .229
Crosswind Assist Function/no tes ................................... 19 0
Cruise control .......................................... 19 6
Ac tivating ............................................ .197
Buttons ................................................ 197
Calling up a speed .............................. .197
Deactivating ......................................... 197
Fu nction .............................................. 19 6
Re quirements ...................................... 197
Selecting .............................................. 197
Setting a speed .................................... 197
St oring a speed .................................... 197
Sy stem limitations ...............................1 96 Index
445

¯
AdBlue sy stem fault Emer. op.:
max. XXX km/h Start not poss. in
XXX km .............................................. .420
¯ AdBlue sy stem fault Emer‐
ge ncy op. in XXX miles See Owner's
Manual ................................................ 420
¯ AdBlue sy stem fault Engine
st art not possible ................................ .421
¯ AdBlue sy stem fault See Own‐
er's Manual ........................................ .420
5 Add 1 litre engine oil when
next refuelling .................................... .422
é ATTENTION ASSIST inoperative .. 401
é ATTENTION ASSIS T:Take a
break! .................................................. 401
: Automatic driving lights inoper‐
ative ..................................................... 375
Á Changekey bat teries .................. 373
J Check brake fluid le vel.............. .393 #
Checkbrake pads See Owner's
Manual ................................................ 393
5 Check eng. oil le v.when next
re fuelling ............................................. 421
ï Checktrailer hitch lo ck.............. 380
h Check tyre(s) .............................. 41 5
! Clean the fuel filter .................... .386
ÿ Coolant Stop vehicle Switch
engine off ............................................ 385
_ Currently una vailable Camera
view restricted ..................................... 405
ç Currently unavailable Radar
sensors dirty .......................................4 04
! currently una vailable See Own‐
er's Manual ........................................ .406
÷ currently una vailable See Own‐
er's Manual ........................................ .407
5 Engine oil le vel cannot be
measured ............................................ 424 5
Engine oil le velRe duce oil le vel
............................................................. 422
5 Engine oil le velSt op vehicle
Switch engine off ................................ 422
5 Engine oil pressure Stop
Switch off engine ................................ 423
ä Fault Drive at max. 80 km/h ...... 398
6 Front left malfunction Consult
wo rkshop (e xample)............................ 370
& inoperative Battery low ...............378
& inoperative Refuel vehicle ........... 378
& inoperative See Owner's Man. ....378
! inoperative See Owner's Man‐
ual ....................................................... 407
÷ inoperative See Owner's Man‐
ual ....................................................... 408
T inoperative See Owner's Man‐
ual ....................................................... 409
G Inoperati ve.................................. 41 0 Index
447

:
Intellige nt Light Sy stem inoper‐
ative ..................................................... 376
Á Key not de tected (red displ ay
messa ge).............................................3 74
Á Key not de tected (white displ ay
messa ge).............................................3 74
: Left dipped beam (e xamp le) ...... .375
6 Left windowbag malfunction
Consult workshop (e xample).............. .370
¢ Lowe ring .................................... 399
: Malfunction See Owner's Man‐
ual ....................................................... 375
ð Maximum speed exceeded ......... 396
Ø ................................................... 419
ç Off..............................................3 95
ë Off.............................................. 398
ï Operation only possible in
transmission position P .......................379
! Parking brake See Owner's
Manual ................................................ 389 É
Please reduce speed .................. 400
Ý Please wait 48 V battery charg‐
ing ........................................................ 413
_ Rear left seat backrest not
loc ked (Example) .................................3 83
h Rectify tyre pressure ...................41 5
Ø Refill Ad Blue See Owne r’s
Manual .................................................4 18
! Release parking brake ................ 392
¸ Replace air cleaner .....................386
À Replace key See Owner's Man‐
ual ...................................................... .373
Á Replace key ................................ 373
8 Reser vefuel le vel...................... .386
6 Restra int sys. malfunction Con‐
sult workshop ...................................... 370
# See Owner's Manual ...................411
Ù Steering malfunction Incre ased
ph ysical ef fort See Owner's Manual .... 381Ù
Steering malfunction Stop
immediately See Owner's Manual .......382
# Stop vehicle Lea veengine run‐
ning ...................................................... 412
# Stop vehicle See Owner's Man‐
ual ........................................................ 412
É Stop vehicle Vehicle too low .......3 99
ç suspended ................................. 395
: Switch off lights .......................... 376
: Switch on headlamps .................376
Ø Top up AdBlue Emergency op.
in XXX miles See Owner's Manual .......419
+ Top up coolant See Owner ’s
Manual ................................................ 384
¥ Top up washer fluid .................... 384
ï Trailer coupling extending… ........379
! Turn on the ignition torelease
th e parking brake ................................ 393
d Vehicle is operational Switch
off ignition before exiting .................... 379448
Index

Overview .............................................
270
Showing/hiding the menu ...................2 69
Switching on ....................................... 269
Na vigation
see Destination entry
see Map
see Route
Ne arField Communication (NFC)
Locking theve hicle (Digital Vehicle
Ke yst icke r) ............................................ 76
St arting theve hicle (Digital Vehicle
Ke yst icke r) .......................................... 15 6
Un locking theve hicle (Digital Vehicle
Ke yst icke r) ............................................ 76
Ne utral
Engaging .............................................. 16 9
Note s........................................................ 15 9
Optimised acceleration ........................ 15 9O
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 ................................. 250
Displaying the service due date ........... 299
Head-up display menu .........................2 53
Multifunction display ........................... 252
Operating ............................................ 250
Overview of menus .............................. 250
On-board diagno stics inter face
see Diagno stics connection
On-boa rdelectronics
Engine electronics .............................. .351
No tes ................................................... 351
Tw o-w ayradios .................................... 351
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 .......................... .82
Operating fluids
Ad Blue ®
............................................... 360
Ad ditives (fuel) .................................... 358
Brake fluid .......................................... .362
Coolant (engine) .................................. 363
Engine oil ............................................. 361
Fu el (diesel) ......................................... 358
Fu el (petrol) ......................................... 357
No tes .................................................. 355
Wi ndsc reen washer fluid .................... .363
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............................................... 22 460
Index