2018 MERCEDES-BENZ C-CLASS SALOON check engine light

Mercedes‑Benz
recommends Mercedes-Benz
care products for cleaning child restra int sys‐
te ms recommended byMercedes-Benz.
Only use child restra int sy stems which are in
proper working condition 000A
WARNING Risk of inju ryor death caused
by the use of damaged child restra int
sy stems
Child restra int sy stems or their retaining sys‐
te ms that ha vebeen subjec tedto a load in
an accident may then not be able toper form
th eir intended pr otective function.
The child cannot be restra ined in theeve nt of
an accident, heavy braking or a sudden
ch ange of direction. 0007
Alw aysre place child restra int sy stems
immediately that ha vebeen damaged or
in vo lved in an accident. 0007
Have the securing sy stems forth ech ild
re stra int sy stems checked at a qualified
specialist workshop before ins talling a
ch ild restra int sy stem again. Av
oiding direct sunlight 000A
WARNING Risk of bu rns when thech ild
seat is exposed todirect sunlight
If th ech ild restra int sy stem is exposed to
direct sunlight or heat, parts could heat up.
Children could suf fer burns on these parts,
particularly on me tallic parts of thech ild
re stra int sy stem. 0007
Alw ays make sure that thech ild
re stra int sy stem is not exposed to
direct sunlight. 0007
Protect it with a blank et,fo rex ample. 0007
Ifth ech ild restra int sy stem has been
ex posed todirect sunlight, allow it to
cool before secu ring a child into it. 0007
Never lea vechildren unat tended in the
ve hicle. Obser
vewhen stopping or parking 000A
WARNING Risk of accident and inju ry
due tochildren left unat tended in the
ve hicle
If yo u lea vechildren unat tended in theve hi‐
cle, they may be able toset theve hicle in
motion, forex ample by:
R releasing the parking brake.
R shifting the automatic transmission out of
park position 005Dor shifting manual trans‐
mission into idle position.
R starting the engine.
In addition, they may operate vehicle equip‐
ment and become trapped. 0007
Never lea vechildren and animals unat‐
te nded in theve hicle. 0007
When leaving theve hicle, alw aysta ke
th eke y with you and lock theve hicle.
This also applies tothe digital vehicle
ke y if the "Digital Vehicle Key" function
is activated via Mercedes me connect. 50
Occupant saf ety

Ad
aptive Highbeam Assist Plus
(0013 page142)
00CB Maximum permissible speed
exceeded
(for cer tain countries only)
Ve hicles with Traf fic Sign Assis t:de tected
instructions and traf fic signs (0013 page 254). Ad
justing the in stru ment lighting 0007
Turn brightness control 1up or down.
The lighting of the instrument display and in
th e control elements of theve hicle interior is
adjus ted. Menus and submenus
Fu
nctions on the service menu of the on-
board compu ter On-board computer:
0018 Service 0007
Toselect the function: swipe upwards or
down wards on the left-hand Touch Control. 0007
Press the left-hand Touch Control.
Fu nctions on theService menu:
R Message memory (0013 page 490)
R AdBlue :Ad blue ®
ra nge and fill le vel
R Tyres:
- Restart the tyre pressure loss warning
sy stem (0013 page 457)
- Check the tyre pressure with the tyre
pressure monitor (0013 page 451)-
Restart the tyre pressure monitor
(0013 page 452)
R ASSYST PLUS: calls up the service due date
(0013 page 406)
R Vehicles with a widescreen cock pit:Cool-
ant : coolant temp erature display
R Engine oil level: engine oil le vel Calling up
the assistant display On-board computer:
0018 Assistance
The following displa ysare available on the assis‐
ta nt displ aymenu:
R Assis tant displ ay
R Attention le vel (0013 page 252) 0007
Toswitch between the displa ys:swipe
upwards or down wards on the left-hand
To uch Control. 274
Instrument Display and on-board computer

0007
Push the handle 1ofthe bonn etcatch
up wa rds and lift the bonn etby appr oximately
40 cm. 0007
Toclose: lowe rth e bonn etand let it fall from
a height of appr oximately 20 cm. 0007
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 000A
WARNING Risk of bu rns from hot com‐
ponent parts in the engine compartment
Cer tain components in the engine compart‐
ment can be very hot, e.g. the engine, the
ra diator and parts of theex haust sy stem. 0007
Allow the engine tocool down and only
to uch co mponent parts described in the
fo llowing. Plug-in
hybrid: be sure toobser vethe no tes in
th e Supplement. Otherwise, you may failto rec‐
ognise dangers.
Re quirements:
R the engine must ha vean oil dipstic k.If not,
th e engine oil le vel can be checked only with
th e on-board computer (0013 page411).
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. 0007
Park theve hicle on a le vel sur face. 0007
Pull oil dipstick 1out and wipe off. 41 0
Maintenance and care

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
Plug-in hybrid: obser vethe no tes in the Supple‐
ment. Otherwise, you may failto recognise dan‐
ge rs.
000E 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. 0007
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 batteries with a nominal voltage of
12 V.
R The vehicles must not touch.
R Petrol engine: only acceptstarting assis‐
ta nce if the engine and exhaust sy stem are
cold. St
arting assi stance and charging the12 V
battery Requ
irements:
R The vehicle is secured with the electric park‐
ing brake.
R Automatic transmission: the transmission
is in position 005D.
R Manual transmission: the transmission is in
neutral.
R The ignition and all electrical consumers are
switched off.
R The bonn etis open. Breakdown assis
tance 437

Display messages
Possible causes/consequences and 0050
0050Solutions 0007
Consult a qualified specialist workshop immediatel y.
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 pa ckage: Active Brake Assi stistemp orarily una vailable.
The ambient conditions are outside the sy stem limits (0013 page 208). 0007
Drive on.
As soon as the ambient conditions are within the sy stem limits, the sy stem will become available again. 0007
Ifth e display message does not disappear, stop theve hicle while paying attention toroad and traf fic conditions
and restart the engine.
0075
Restraint sys. malfunction
Consult workshop *T
herestra int sy stem is faulty (0013 page 33). 000A
WARNING Risk of inju ryor fata l injury due toa malfunction in there stra int sy stem
If th ere stra int sy stem is malfunctioning, restra int sy stem components may be triggered unintentionally or
might not be triggered at all in theeve nt of an accident. This may af fect the seat belt tensioner or airbag, for
ex ample. 0007
Have there stra int sy stem checked and repaired immediately at a qualified specialist workshop. De
tection of a restra int sy stem fault:
R The restra int sy stem warning lamp 0075does not light up when the ignition is switched on.
R The restra int sy stem warning lamp 0075lights up continuously or repeatedly during a journe y. Displ
aymessa ges and warning/indicator lamps 503

Wa
rning/indicator lamp
Possible causes/consequences and 0050
0050Solutions
Suspension warning lam pT here is a fault in theDY NA MIC BODY CONTROL. 0007
Obser vethe messages on the multifunction displa y.
L
Wa rning lamp for dis tance
wa rning function The
red dis tancewarning lamp lights up while theve hicle is in motion.
The dis tance totheve hicle in front is too small forth e speed selected.
If th ere is an additional warning tone, you are approaching an obs tacle at too high a speed. 0007
Be prepared tobrake immediatel y. 0007
Increase the dis tance.
Fu nction of Active Brake Assi st . Engine
Wa
rning/indicator lamp
Possible causes/consequences and 0050
0050Solutions
00B9 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. 0007
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. Displ
aymessa ges and warning/indicator lamps 553

Climate
style
Fu nction .............................................. 157
Setting ................................................. 157
Cockpit ........................................................ .6
Overview .................................................6
Cof fee cup symbol
see ATTENTION ASSIST
Collapsible spare wheel .......................... 469
No tes .................................................. 469
COMAND Online see Multimedia sy stem
COMAND Touch
Managing devices ................................ 311
Combination switch ................................137
Compass .................................................. 345
Compu ter
see On-board computer
Connection status
Displ aying ............................................ 374
Overview ..............................................3 74Connectivity
Swit ching transmission of theve hicle
position on/off .................................... 308
Contacts ................................................... 354
Calling up ............................................ 355
Deleting ............................................... 356
Downloading (from mobile phone) ...... 355
Importing ............................................ 356
Importing (o verview) .......................... .355
Information .......................................... 354
Making a call ....................................... 356
Na me form at ...................................... .355
Options ................................................ 356
St oring ................................................ 356
Controller Operating ............................................ 299
Con venience closing ................................. 90
Con venience opening ................................ 90
Coolant (engine) Check le vel .......................................... 413
No tes .................................................. 483
Cooling see Climate control Co
pyright .................................................... 31
Cornering light ........................................ .139
Cross Traf fic Alert .................................... 251
Crosswind Assist Function/no tes ................................... 207
Cruise control .......................................... 214
Ac tivating ............................................ .216
Buttons ................................................ 216
Calling up a speed .............................. .216
Deactivating ......................................... 216
Fu nction ............................................... 214
Re quirements ...................................... 216
Selecting .............................................. 216
Setting a speed .................................... 216
St oring a speed .................................... 216
Sy stem limitations ...............................2 14
Cup holder Rear .................................................... .128
Cup holder in the centre console
In stalling/removing ............................ .127
ins talling/ removing (auto matic
transmission) ....................................... 12 6 Index
567

Ad
aptive Highbeam Assist Plus Cam‐
era view restricted See Owner's
Manual ................................................ 544
Ad aptive Highbeam Assist Plus cur‐
re ntly una vailable See Owner's Man‐
ual ...................................................... .544
Ad aptive Highbeam Assist Plus inop‐
erative ................................................ .544
0099 AdBlue sy stem fault Engine
st art not possible ................................ 523
0099 AdBlue sy stem fault Perf.
re duced in XXX km See Owner's
Manual ................................................ 523
0099 AdBlue sy stem fault Perf.
re duced: XXX mph No start in XXX
miles .................................................. .523
0099 AdBlue sy stem fault See Own‐
er's Manual ........................................ .522
00B2Ad d 1 litre engine oil when next
re fuelling ............................................. 521 Apply brake
todeselect Park (P)
position ...............................................5 25
Apply brake toselect R ........................ 527
00ADAT TENTION ASSIST inoperative ....511
00AD ATTENTION ASSIS T:Take a
break! .................................................. 507
0049Au tomatic driving lights inoper‐
ative .................................................... 542
Au xilia rybattery malfunction .............. 525
0044Before starting the engine, turn
th esteering wheel. .............................. 527
Blind Spot Assist cur rently una vaila‐
ble See Owner's Manual ...................... 505
Blind Spot Assist inope rative ............... 506
Blind Spot Assi stnot available when
to wing a trailer See Owner's Manual ...5 09
Brake immediate ly............................... 491
Cannot start engine See Owner's
Manual ................................................ .517
00AF Changekey bat teries .................. 534 004DCheck brake
fluid le vel................ 496
Check brake pads See Owner's Man‐
ual ...................................................... .504
00B2Che ckeng. oil le v.when next
re fuelling ............................................. 521
00CAChe cktrailer hitch lo ck(white
display message) .................................5 36
Che cktyre pressu resth en restart
Ru n Flat Indicator ................................ 532
0077Check tyre(s) ............................... 530
003AClean the fuel filter ...................... 51 5
Clutch overheated Avoid pulling away
fo r XX:XX mins .................................... 526
00ACCoolant Stop vehicle Switch
engine off ............................................. 517
Cruise cont rol and Limiter inope ra‐
tive ....................................................... 512
Cruise cont rol inope rative .................... 512
Cruise cont rol off ................................ .512 57 0
Index