check engine MERCEDES-BENZ E-CLASS SALOON 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 409

Display messages
Possible causes/consequences and M
MSolutions
¯ AdBlue system fault Engine
start not possible *
The AdBlue ®
sy stem is malfunctioning. You can no lon gerst art the engine. #
Consult a qualified specialist workshop immediatel y. Engine oil
Display messages
Possible causes/consequences and M MSolutions
5 Check eng. oil lev. when
next refuelling *T
he engine oil le vel has dropped tothe minimum le vel.
* NO
TEEngine dama gecaused bydriving with insuf ficient engine oil #
Avoid long journe yswith insuf ficient engine oil. #
Check the engine oil le vel when next refuelling.
To p up the engine oil (/ page 304).
No tes on engine oil (/ page 361). Display messages and
warning/indicator lamps 421

Display messages
Possible causes/consequences and M
MSolutions
* 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 304). #
Check the engine oil le vel.
No tes on engine oil (/ page 361).
5
Engine oil pressure Stop
Switch off engine *D
isplay message only for cer tain engines:
The oil pressure is too lo w.
* NO
TEEngine dama gecaused bydriving with insuf ficient oil pressure #
Avoid driving with insuf ficient oil pressure. #
Stop theve hicle immediately in accordance with the traf fic conditions. Do not continue driving. #
Consult a qualified specialist workshop. Display messages and
warning/indicator lamps 423

Occupant saf
ety Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
6 Re stra int sy stem warning
lamp The
redre stra int sy stem warning lamp is lit while the engine is running.
*The restra int sy stem is malfunctioning (/ page 36). &
WARNING 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 The
red seat belt warning lamp flashes and an intermit tent wa rning tone sounds.
*T he driver or front passenger has not fastened his/her seat belt while theve hicle is in motion. #
Fasten your seat belt (/ page 39).
*T here are objects on the front passenger seat. #
Remo vethe objects from the front passenger seat. 426
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

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
J Brake sy stem warning lamp
(yellow) The
yellow brake sy stem warning lamp is lit while the engine is running.
* &
WARNING 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. #
Consult a qualified specialist workshop.
J Brake sy stem warning lamp
(red) The
red brake sy stem warning lamp is lit while the engine is running.
*Possible causes: R The brake forc e boosting is malfunctioning and the braking characteristics may be af fected.
R The reis insuf ficient brake fluid in the brake fluid reser voir. #
Notethe messages on the multifunction displa y. &
WARNING Risk of accident and inju ryif brake forc e boosting is malfunctioning
If brake forc e boosting is malfunctioning, increased brake pedal forc e may be necessary for braking. The braking
ch aracteristics may be impaired. The braking dis tance can increase in emergency braking situations. 432
Display messa ges and warning/indicator lamps

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
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. ÷
ESP ®
wa rning lamp flashes The
yellow ESP ®
wa rning lamp flashes while theve hicle is in motion.
*O ne or more wheels has reached its grip limit (/ page188). #
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. &
WARNING 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 435

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