check engine MERCEDES-BENZ E-CLASS ESTATE 2020 User Guide

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 (/ page313).
No tes on engine oil (/ page371). Displ
aymessa ges and warning/indicator lamps 433

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. 438
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 314). Displ
aymessa ges and warning/indicator lamps 441

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.442
Displaymessa ges 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. 444
Displaymessa 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 (/ page196). #
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 447

Re
sidual heat ....................................... 154
Setting (MBUX multimedia sy stem) ..... 15 2
Setting the air distribution ...................1 51
Setting the air flow ............................... 151
Setting the climate style ......................1 53
Setting the fragrance sy stem ............... 154
Setting thete mp erature ....................... 151
St ationary heater/ ventilation .............. 15 6
Switching on/off ................................. 15 2
Switching there ar wind owheater
on/off .................................................. 151
THERMATIC contro l panel .................... 151
THERMOTRONIC contro l panel ............151
Ve ntilating theve hicle (con venience
opening) ................................................ 86
Wi ndsc reen heating ............................. 15 6
Climate style
Fu nction .............................................. 15 3
Setting ................................................. 15 3
Cockpit ........................................................ .6
Overview .................................................6
Cof fee cup symbol
see ATTENTION ASSIST
Collision de tection (pa rked vehicle) ......19 2 Combination switch
................................13 5
Combined luggage co ver and net
At tach ing tothere ar seat backrest .... .123
Ins talling/ removing ............................. 12 2
Compu ter
see On-board computer
Consum ption indicator
Calling up ............................................ .176
Con venience closing ................................. 87
Con venience opening ................................ 86
Coolant (engine) Check le vel .......................................... 314
No tes ................................................... 373
Cooling see Climate control
Copyright .................................................. .34
Cornering light ........................................ .136
Cross Traf fic Alert .................................. .238
Crosswind Assist Function/no tes ................................... 19 8
Cruise control .......................................... 204
Ac tivating ............................................ 205 Buttons ................................................ 205
Calling up a speed ............................... 205
Deactivating ........................................ 205
Fu nction .............................................. 204
Re quirements ...................................... 205
Selecting ............................................ .205
Setting a speed ................................... 205
St oring a speed ................................... 205
Sy stem limitations ...............................2 04 D
Dashboard see Cockpit
Data acquisition Vehicle ................................................... 31
Data storage
Electronic control units .......................... 31
Online services ...................................... 33
Ve hicle ................................................... 31
Deactivating the ala rm(ATA ).................... 94
Deale rship
see Qualified speciali stwo rkshop
Declaration of conformity Electromagnetic compatibility ............... 24 Index
457

é
ATTENTION ASSIS T:Take a
break! .................................................. 412
: Automatic driving lights inoper‐
ative .................................................... 385
Á Change key bat teries ................. 383
J Check brake fluid le vel.............. .403
# Checkbrake pads See Owner's
Manual ................................................ 403
5 Check eng. oil le v.when next
re fuelling ............................................. 433
ï Checktrailer hitch lo ck.............. 390
h Check tyre(s) .............................. 427
! Clean the fuel filter .................... .396
É Compressor is cooling ................41 0
ÿ Coolant Stop vehicle Switch
engine off ............................................ 395
_ Currently una vailable Camera
view restricted ..................................... 416
ç Currently una vailable Radar
sensors dirty ........................................ 41 5!
currently una vailable See Own‐
er's Manual .......................................... 41 8
÷ currently una vailable See Own‐
er's Manual .......................................... 419
5 Engine oil le vel cannot be
measured ............................................ 436
5 Engine oil le velRe duce oil le vel
............................................................. 434
5 Engine oil le velSt op vehicle
Switch engine off ................................ 434
5 Engine oil pressure Stop
Switch off engine ................................ 435
ä Fault Drive at max. 80 km/h ...... 408
6 Front left malfunction Consult
wo rkshop (e xample)............................ 380
& inoperative Battery low .............. 388
& inoperative Refuel vehicle ..........3 88
& inoperative See Owner's Man. ... 388
! inoperative See Owner's Man‐
ual ....................................................... .419 ÷
inoperative See Owner's Man‐
ual ....................................................... 420
T inoperative See Owner's Man‐
ual ....................................................... 421
G Inoperati ve................................. 422
î inoperati ve.................................. 416
: Intellige nt Light Sy stem inoper‐
ative ....................................................3 86
Á Key not de tected (red displ ay
messa ge).............................................3 84
Á Key not de tected (white displ ay
messa ge).............................................3 84
: Left dipped beam (e xamp le) ...... .385
6 Left wind owbag malfunction
Consult workshop (e xample).............. .380
¢ Lowe ring .................................... 409
: Malfunction See Owner's Man‐
ual ....................................................... 385
É Max. speed 35 km/h (red dis‐
pl ay messa ge)...................................... 411 Index
459

Ac
tive Blind Spot Assi stcur rently
una vailable See Owner's Manual .........414
Ac tive Blind Spot Assi stinope rative ..... 414
Ac tive Blind Spot Assi stnot available
when towing a trailer See Owner's
Manual ................................................ .414
Ac tive bonnet malfunction See Own‐
er's Manual ......................................... 392
Ac tive Brake Assi stFunctions cur‐
re ntly limited See Owner's Manual ...... 421
Ac tive Brake Assi stFunctions limited
See Owner's Manual ........................... 422
Ac tive Dis tance Assi stavailable
again .................................................. .406
Ac tive Dis tance Assi stcur rently
una vailable See Owner's Manual .........405
Ac tive Dis tance Assi stinope rative ...... 406
Ac tive Lane Keeping Assist cur rently
una vailable See Owner's Manual .........414 Ac
tive Lane Keeping Assist inopera‐
tive .......................................................4 15
Ac tive Parking Assist and
PA RKTRONIC inoperati veSee Own‐
er's Manual .......................................... 412
Ac tive Steering Assist cur rently
una vailable due tomultiple emer‐
ge ncy stops ......................................... 407
Ac tive Steering Assist cur rently
una vailable See Owner's Manual .........406
Ac tive Steering Assist inoperative .......407
Ac tive Stop-and-Go Assist cur rently
una vailable see Owner's Manual .........407
Ac tive Stop-and-Go Assist inopera‐
tive See Owner's Manual ..................... 408
Ad aptive Highbeam Assist cur rently
una vailable See Owner's Manual .........387
Ad aptive Highbeam Assist inopera‐
tive ...................................................... 387 Ad
aptive Highbeam Assist Plus cur‐
re ntly una vailable See Owner's Man‐
ual ...................................................... .387
Ad aptive Highbeam Assist Plus inop‐
erative ................................................ .387
App lybrake todeselect Park (P)
position ...............................................3 97
App lybrake toselect D or R ................397
App lybrake toselect R ........................ 397
Au xilia rybattery malfunction .............. 399
Beginning emer gency stop .................. 407
Blind Spot Assist cur rently una vaila‐
ble See Owner's Manual ......................413
Blind Spot Assi stinope rative ............... 413
Blind Spot Assi stnot available when
to wing a trailer See Owner's Manual ...4 13
Cann otstart engine See Owner's
Manual ................................................ 425
Check tyre pressures then restart
Ru n Flat Indicator ................................ 430 Index
461

Cruise cont
rol and Limiter inope ra‐
tive ...................................................... 404
Cruise control inope rative ................... 404
Cruise control off ................................ 404
Fr ont-passenger airbag disabled See
Owner's Manual ................................... 381
Fr ont-passenger airbag enabled See
Owner's Manual ................................... 381
Hazard warning lamps malfunction‐
ing ...................................................... .387
Limiter inoperative .............................. 405
Limiter passive .................................... 404
Mercedes me connect Services limi‐
te d See Owner's Manual .....................422
Mo tor can be star ted again .................4 25
N permanently active Risk of vehicle
ro lling .................................................. 398
Not in cur rent drive program ................411
Only select Park (P) when vehicle is
st ationary ............................................ 396 Place
theke y in the mar ked space
See Owner's Manual ...........................384
PRE-SAFE impulse side inoperative
See Owner's Manual ........................... 382
PRE-SAFE inoperative See Owner's
Manual ................................................ 382
Re duce speed ...................................... 429
Re versing not poss. Consult work‐
shop ....................................................3 98
Risk of vehicle rolling Driver door
open and transmission not in P ...........397
Ru n Flat Indicator inope rative ............. 430
Speed limit (winter tyres) XXX km/h ... 406
St op vehicle Lea veengine running
Wa itTransmission cooling ...................399
To shift out of P or N,depress brake
and start engine .................................. 397
To switch off the engine, press the
St art/ Stop button for at least 3 sec‐
onds or 3 times. .................................. 394 Tr
af fic Sign Assi stcur rently una vaila‐
ble See Owner's Manual ......................412
Tr af fic Sign Assi stinope rative .............. 413
Tr ansmission Malfunction Stop ........... 398
Ty re press. monitor cur rently una vail‐
able .................................................... .426
Ty re press. monitor inoperative ...........426
Ty re press. monitor inoperative No
wheel sensors .................................... .426
Ty re pressure Check tyres ...................429
Ty re(s) ove rheated ...............................4 28
Wi thout changing gear, consult work‐
shop ....................................................3 98
Display on the windscreen
see Head-up display
Distance control see Active Dis tance Assi stDISTRONIC
DI STRO NIC
see Active Dis tance Assi stDISTRONIC
Door Additional door lock ...............................74 462
Index