check engine light MERCEDES-BENZ E-CLASS COUPE 2020 Owners Manual

#
Toswitch on the po wer supp ly:press but‐
to n1 once.
Yo u can activate the windscreen wiper, for
ex ample.
The po wer supp lyis switched off again if thefo l‐
lowing conditions are me t:
R You open the driver's door.
R you press but ton1 twice more. #
Toswitch on the ignition: press button 1
twice.
The indicator lamps in the instrument clus ter
light up.
The ignition is switched off again if one of the
fo llowing conditions is me t:
R you do not start theve hicle within
15 minutes and the transmission is in posi‐
tion jorthe electric parking brake is
applied.
R you press but ton1 once. St
arting theve hicle St
arting theve hicle with thest art/s top but‐
ton &
DANG ER Risk of death caused by
ex haust gases
Combustion engines emit poisonous exhaust
ga ses such as carbon monoxide. Inhaling
th ese exhaust gases is hazardous tohealth
and leads topoisoning. #
Never lea vethe engine or, if present,
th e auxiliary heating running in an
enclosed space wi thout suf ficient venti‐
lation. &
WARNING Risk offire due toflammable
material in the engine compartment or
th eex haust sy stem
Flammable materials may ignite. #
Therefore, check regularly that there
are no flammable materials in the
engine compartment or on theex haust
sy stem. Re
quirements:
R theke y is in theve hicle and is recognised.
R or: a Digi talVe hicle Keyst icke r is located in
th e mar ked space (/ page154). #
Shift the transmission toposition jori. #
Depress the brake pedal and press button
1 once. Driving and parking
15 3

#
Ifth e bonn etcan still be lif ted slightl y,open
th e bonn etagain and close it with a little
more forc e until it engages cor rectly. Engine oil
Che
cking the engine oil le vel using the on-
board compu ter
Re quirements:
R the engine has been warmed up.
R theve hicle is par ked on a le vel sur face.
R The engine is running at idle speed.
The engine oil le vel is de term ined during driving.
De term ining the engine oil le vel can take up to
30 minutes with a normal driving style and even
longer with an active driving style.
On-board computer: 4 Service 5
Engine oil level
Yo u will see one of thefo llowing messages on
th e multifunction display:
R Engine oil level Measuring now : measure‐
ment of the oil le vel is not yet possible. #
Repeat there qu est af ter a maximum of
30 minutes' driving.
R Engine oil level OK andthe bar display for
indicating the oil le vel on the multifunction
display is green and is between "min" and
"max": the oil le vel is cor rect.
R Engine oil level Add 1,0 l andthe bar display
fo r indicating the oil le vel on the multifunc‐
tion display is orange and is below "min": #
Add 1 l of engine oil.
R Reduce engine oil level andthe bar display
fo r indicating the oil le vel on the multifunc‐
tion display is orange and is abo ve"max": #
Drain off any excess engine oil that has been
added. Todo so, consult a qualified specialist
wo rkshop.
R For engine oil level turn on ignition #
Switch on the ignition tocheck the engine oil
le ve l.
R Engine oil level System inoperative : The oil
le ve l sensor is defective or not connec ted. #
Consult a qualified specialist workshop.
R Engine oil level System currently unavail. #
Close the bonn et.
To pping up engine oil &
WARNING Risk of bu rns from hot com‐
ponent parts in the engine compartment
Cer tain component parts in the engine com‐
partment can be very hot, e.g. the engine,
th e cooler and parts of theex haust sy stem. #
Allow the engine tocool down and only
to uch co mponent parts described in
th efo llowing. &
WARNING Risk offire and injury from
engine oil
If engine oil comes into con tact wi thhot
component parts in the engine compart‐
ment, it may ignite. #
Make sure that no engine oil is spilled
next tothefiller opening. Maintenance and care
299

&
WARNING Risk ofexplosion during
ch arging process and starting assis tance
During thech arging process and starting
assis tance, the battery may release an explo‐
sive gas mixture. #
Avoid fire , naked flames, creating
spar ksand smoking. #
Make sure there is suf ficient ventila‐
tion. #
Do not lean over a batter y. &
WARNING Risk ofexplosion from a fro‐
zen battery
A dischar ged battery may freeze at temp era‐
tures slightly abo veor below freezing point.
During starting assis tance or battery charg‐
ing, bat tery gas can be released. #
Alw ays allow a battery tothaw before
ch arging it or per form ing starting assis‐
ta nce. If
th e indicator/warning lamps in the instrument
clus ter do not light up at low temp eratures, it is
ve ry likely that the dischar ged battery has fro‐
zen. In this case you may neither jump-s tart the
ve hicle nor charge the batter y.
The service life of a battery that has been
th awe d may be dramatically shor tened. The
st arting characteristics may be impaired, espe‐
cially at low temp eratures.
It is recommended that you ha veathaw ed bat‐
te ry checked at a qualified specialist workshop.
All vehicles
* NO
TEDama gecaused bynumerous or
ex tended attem ptsto start the engine Nume
rous or extended attem ptsto start the
engine may damage the catalytic con verter
due tonon-combu sted fuel. #
Avoid numerous and extended attem pts
to start the engine. Obser
vethefo llowing points during starting
assis tance and when charging the battery:
R Only use undamaged jump lead/charging
cables with a suf ficient cross-section and
insula tedte rm inal clamps.
R Non- insulated parts of thete rm inal clamps
must not come into con tact wi thother me tal
parts while the jump lead/charging cable is
connected tothe battery/jump-s tart connec‐
tion point.
R The jump lead/charging cable must not
come into contact wi thany parts which may
mo vewhen the engine is running.
R Alw ays make sure that nei ther you nor the
battery is elect rostatically charge d.
R Keep away from fire and naked flames.
R Do not lean overth e batter y.
Obser vethe additional following points when
ch arging the battery:
R Only use battery charge rs tested and
appr oved for Mercedes-Benz.
R Read the battery charge r's operating instruc‐
tions before charging the batter y. 320
Breakdown assis tance

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 (/ page185). #
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 429

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

Engine electronics
Notes ................................................... 347
Engine number ........................................3 49
Engine oil ................................................. 299
Ad ditives .............................................3 57
Capacity .............................................. 358
Checking the oil le vel using the on-
board computer ................................... 299
MB-Fr eigabe or MB-Appr oval .............. .358
Quality ................................................. 358
To pping up ...........................................2 99
EQ Boost Operating saf ety .................................... 22
Quali fied specialist workshop ................29
ERA-GLONASS test mode
St arting/ending .................................. 286
ESC (Elect ronic Stability Control)
see ESP ®
(Electronic Stability Prog ram)
ESP ®
Crosswind Assist ................................. 187
Tr ailer stabilisation .............................. 187
ESP ®
(Electronic Stability Prog ram) ...... 185
Ac tivating/deactivating ...................... .187 Fu
nction/no tes ................................... 185
EU general operating permit number ....349
Exterior lighting see Lights
Exterior lighting (care) ............................ 305 F
Fa tigue de tection
see ATTENTION ASSIST
Fa ult message
see Displ aymessa ge
Fi re extinguisher ...................................... 310
Firs t-aid kit (soft sided) ...........................310
Flacon Inserting/removing ............................ .144
Flat towing
see Tow- bar sy stem
Flat tyre ....................................................3 11
MOExtended tyres ................................ 311
No tes ................................................... 311
TIREFIT kit ............................................ 313
Wheel change ...................................... 341 Floor mats
................................................ 121
Fo g light (extended range) ......................1 27
Fo il co vering
Ra dar and ultrasonic sensors .............. 183
Fr ag rance
see Frag rance sy stem
Fr ag rance sy stem .................................... 14 4
Inserting/removing theflacon ............ .144
Setting ................................................. 14 4
Fr ee software ............................................ 34
Fr equencies
Mobile phone ...................................... 348
Tw o-w ayradio ...................................... 348
Fr ont airbag (driver, front passenger) .....42
Fr ont passenger seat
see Seat
Fu el .......................................................... .354
Ad ditives .............................................3 54
Diesel .................................................. 354
E10 ...................................................... 353
Fu elreser ve ........................................ 355
Low outside temp eratures ...................3 54
Pe trol ................................................... 353 Index
447