2021 MERCEDES-BENZ C-CLASS COUPE check engine light

#
Push handle 1ofthe bonn etcatch up wards
and lift the bonn etuntil it opens automati‐
call y.
Closing the bonnet #
Lowe rth e bonn etto a height of around
20 cm and then allow it tofall, applying a lit‐
tle forc e as you let it go. #
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 oil
dip stick &
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. Re
quirements:
R The engine has an oil dipstic k.If not, the
engine oil le vel can be checked only with the
on-board computer (/ page 366) . Depending on
the engine, the oil dipstick may be
ins talled in the engine compartment in dif fere nt
locations.
The waiting time before checking the oil le vel
when the engine is at normal operating temp era‐
ture is five minutes. #
Park theve hicle on a le vel sur face. #
Pull oil dipstick 1out and wipe off. Maintenance and care
365

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. Obser
vethe additional following points during
st arting assis tance:
R Starting assis tance may only be pr ovided
using vehicles, batteries or other jump start
devices with a nominal voltage of 12V.
R The vehicles must not touch.
R Vehicles with a petrol engine: jump-start
th eve hicle only when the engine and exhaust
sy stem are cold. St
arting assi stance and charging the12 V
battery Preparing
starting assi stance/charging #
Secure theve hicle byapplying the electric
parking brake. #
Automatic transmission: shiftthe trans‐
mission toposition j. #
Manual transmission: shiftthe transmis‐
sion toneutral. #
Switch off the ignition and all electrical con‐
sumers. #
Open the bonn et. 388
Breakdown assis tance

Occupant saf
ety Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
6 Re stra int sy stem warning
lamp *T
he redre stra int sy stem warning lamp is lit while the engine is running.
The restra int sy stem is malfunctioning (/ page 38). &
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 *T
he red seat belt warning lamp flashes and an intermit tent wa rning tone sounds.
or
The red seat belt warning lamp lights up once the engine has star ted.
In addition, an intermittent warning tone may sound.
The red seat belt warning lamp flashes and an intermit tent wa rning tone sounds:
The driver or front passenger has not fastened his or her seat belt while theve hicle is in motion. #
Fasten your seat belt (/ page 42).
There are objects on the front passenger seat. Display messages and
warning/indicator lamps 489

Ac
tivating/deactivating the synchro‐
nisation function (cont rol panel)............ 13 6
Ac tivating/deactivating the synchro‐
nisation function (multimedia sy stem)... 13 6
Air-reci rculation mode.......................... .137
Au tomatic control.................................. 13 6
Demi sting the windscreen..................... 13 5
Demi sting windo ws............................... 13 6
Fr ont air vents....................................... 14 2
Inserting/removing theflacon (fra‐
gr ance sy stem)...................................... 137
Ionisation............................................... 137
No te...................................................... 13 5
Re ar air vents....................................... .143
Re sidual heat......................................... 137
Setting the air distribution..................... 13 5
Setting the air flow ................................. 13 5
Setting the fragrance sy stem.................1 37
Setting theve hicle interior temp era‐
ture........................................................ 13 5
St ationary heater/ ventilation................ 13 8
Switching on/of f................................... 13 5
Switching there ar wind owheater
on/off...................................................1 35
THERMATIC control pane l...................... 13 5
THERMOTRONIC contro l panel..............135 Ve
ntilating theve hicle (con venience
opening).................................................. 86
Co ckpit
Overview................................................... 6
Co ffee cup symbol
see ATTENTION ASSIST
Collision de tection (pa rked vehicle)
Information............................................ 173
COMAND Online see Multimedia sy stem
COMAND Touch
Managing devices.................................. 268
Combination switch .................................. 12 3
Compass..................................................... 301
Compu ter
see On-board computer
Connection status
Displ aying.............................................. 332
Overview............................................... 332
Contacts Calling up.............................................. .311
Del eting................................................ .312
Downloading (from mobile phone )......... 310 Importing...............................................
311
Importing (o verview)............................. .311
Information............................................ 310
Making a call......................................... 312
Na me form at......................................... .311
Options.................................................. 312
St oring................................................... 312
Controller Operating.............................................. 256
Con venience closing ................................... 86
Con venience opening ..................................86
Coolant (engine) Check le vel............................................ 368
No tes....................................................4 28
Cooling see Clima tecontrol
Co pyright..................................................... 36
Cornering light ...........................................1 24
Cross Traf fic Alert..................................... 225
Crosswind Assist Function/no tes...................................... 178 Index
509

DIRECT SELECT le
ver
Engaging drive position........................ .159
Engaging neutral................................... .158
Engaging park position.......................... 15 9
Engaging pa rkposition automatically....1 59
Engaging reve rsege ar........................... 15 8
Fu nction................................................ 157
Display (care) ............................................ .374
Display (multimedia sy stem)
Settings................................................. 263
Display (on-boa rdcompu ter)
Displ ays on the multifunction displa y.... 236
Displ aymessage
Calling up (on-board compu ter)............. 433
No tes....................................................4 33
Display messages ¯ - - - km/h ..................................... 458
ç - - - km/h ..................................... 459
È - - - km/h ..................................... 459
# 12V battery See Owner's Man‐
ual..........................................................4 74Û
48 V battery See Owner's Man‐
ual.......................................................... 476
: Active Light Sy stem inoperative... 440
¯ AdBlue sy stem fault Emer. op.:
max. XXX mphSt art not poss. in XXX
miles .................................................... .484
¯ AdBlue sy stem fault Emer‐
ge ncy op. in XXX km See Owner's
Manual.................................................. 483
¯ AdBlue sy stem fault Engine
st art not possible................................. .484
¯ AdBlue sy stem fault See Own‐
er's Manual .......................................... .483
5 Add 1 litre engine oil when
next refuelling....................................... 485
é ATTENTION ASSIST inoperative ....458
é ATTENTION ASSIS T:Take a
break!....................................................4 58
: Automatic driving lights inoper‐
ative...................................................... 439 Á
Change key bat teries .................... 437
J Check brake fluid le vel................. 456
# Check brake pads See Owner's
Manual.................................................. 457
5 Check engine oil le vel when
next refuelling....................................... 485
ï Checktrailer hitch lo ck................ 443
h Check tyre(s) ................................ 478
! Clean the fuel filter ...................... 449
ÿ Coolant Stop vehicle Switch
engine off..............................................4 48
! currently una vailable See Own‐
er's Manual .......................................... .469
÷ currently una vailable See Own‐
er's Manual .......................................... .470
5 Engine oil le vel cannot be
measured .............................................. 487
5 Engine oil le velRe duce oil le vel.... 486
5 Engine oil le velSt op vehicle
Switch engine off.................................. 486 Index
511

ENERGIZING COMFORT
Overview of programmes...................... .275
St arting the programme........................ 275
Engine ECO start/ stop function........................ 15 2
Engine number....................................... 41 8
St arting (eme rgency operation mode).. .146
St arting (Remo teOnline).......................1 47
St arting (s tart/s top button).................. 14 5
St arting assis tance................................ 388
Switching off (s tart/s top button).......... 16 8
Engine bonnet Function (active bonnet)........................ 362
Opening/closing................................... 363
Engine data Displaying.............................................. 157
Engine electronics Notes..................................................... 416
Engine number .......................................... .418
Engine oil Additives...............................................4 26
Capacity................................................ 427
Che cking the oil le vel using the oil
dipstick................................................. 365 Checking
the oil le vel using the on-
board computer..................................... 366
MB-Fr eigabe or MB-Appr oval................ .427
Quality................................................... 427
To pping up............................................. 366
Entering characters
Fu nction/no tes...................................... 261
On theto uchpad.................................. .263
Using the controller............................... 262
EQ Boost technology
Operating saf ety...................................... 23
ERA-G LONA SS test mode
St arting/ending.................................... 328
Er ro r message
see Displ aymessa ge
ESC (Electronic Stability Control)
see ESP ®
(Electronic Stability Prog ram)
ESP ®
Crosswind Assist.................................. .178
Tr ailer stabilisation................................ 17 9
ESP ®
(Electronic Stability Prog ram)
Ac tivating/deactivating......................... 17 9
Fu nction/no tes..................................... 17 7EU
general operating permit number ......41 8
Exterior lighting Care...................................................... .373
Exterior lighting see Lights F
Fa tigue de tection
see ATTENTION ASSIST
Favo urites
Ad ding................................................... 259
Calling up.............................................. 259
Deleting.................................................2 59
Moving.................................................. 259
Overview............................................... 258
Re naming.............................................. 259
Fi lling station sear ch
St arting automatic sear ch..................... 280
Switching the automatic sear chon/
off.........................................................2 86
Using auto matic search......................... 286
Fi re extinguisher....................................... 377
Firs t-aid kit (soft sided) ............................377 Index
517