warning MERCEDES-BENZ C-CLASS SALOON 2018 Owners Manual

000A
WARNING Risk of accident due tothe
specified tyre pressure not being ach‐
ie ved
If th e specified tyre pressure is not achie ved
af te r a brief drive, the tyre is too badly dam‐
aged. The tyre sealant cannot repair the tyre
in this ins tance.
Dama ged tyres and a tyre pressure that is
to o low can significantly impair braking and
handling characteristics. 0007
Do not drive on. 0007
Consult a qualified specialist workshop. Countries
that ha veMercedes-Benz
Service24h: you will find a sticke r with thete le‐
phone number, e.g. on the B‑pillar on the driver's
side. 0007
Cor rect the tyre pressure if it is still at least
13 0 kPa (1.3 bar/19 psi). See the tyre pres‐
sure table on the fuel filler flap forva lues. 0007
Toincrease the ty repressure: switch on
th e tyre inflation compressor. 0007
Toreduce the tyre pressure: press pres‐
su re re lease button 1next tomanome ter
2 . 0007
When the tyre pressure is cor rect, unscr ew
th efilling hose from theva lve of the sealed
tyre. 0007
Screw theva lve cap onto theva lve of the
sealed tyre. 0007
Pull the tyre sealant bottle out of the tyre
inflation compressor. Press the locking tabs
on theye llow cap toget her todo this.
The filling hose stay s on the tyre sealant bot‐
tle. 0007
Drive tothe nearest qualified specialist work‐
shop and ha vethe tyre, tyre sealant bottle
and filling hose replaced there. Breakdown assis
tance 433

Battery (vehicle)
Note
s onthe12 V battery 000A
WARNING Risk of an accident due to
wo rkcar ried out incor rectly on the bat‐
te ry
Wo rkcar ried out incor rectly on the battery
can, forex ample, lead toa short circuit. This
can lead tofunction restrictions in saf ety-re l‐
eva nt sy stems, e.g. the lighting sy stem, ABS
(anti-lock braking sy stem) or ESP ®
(Elec‐
tronic Stability Prog ram). The operating
saf ety of your vehicle may be restricted.
Yo u could lose cont rol of theve hicle in the
fo llowing situations:
R when braking
R intheeve nt of ab rupt steering manoeu‐
vres and/or when theve hicle's speed is
not adap tedto thero ad conditions 0007
Intheeve nt of a sho rtcircuit or a simi‐
lar incident, contact a qualified special‐
ist workshop immediately. 0007
Do not continue driving. 0007
Alw ays ha vewo rkon the battery car ried
out at a qualified specialist workshop. R
Further information on ABS
(0013 page 203)
R Further information on ESP ®
(0013 page 204)
Fo r saf etyre asons, Mercedes-Benz recommends
th at you on lyuse bat teries which ha vebeen tes‐
te d and appr ovedfo ryo ur vehicle byMercedes-
Benz. These batteries pr ovide inc reased impact
pr otection topreve ntvehicle occupants from
suf fering acid bu rns should the battery be dam‐
aged in theeve nt of an accident.
All vehicles except vehicles with a lithium-
ion battery 000A
WARNING Risk ofexplosion due toelec‐
tros tatic charge
Electros tatic charge can cause spa rks which
may ignite the highly flammable gas mixture
in the batter y. 0007
Todischar geany electros tatic charge
th at may ha vebuilt up, touch the me tal
ve hicle body before handling the bat‐
te ry. The highly
flammable gas mixture is created
while the battery is charging and during starting
assis tance. 000A
WARNING Danger of chemical burns
from the battery acid
Battery acid is caustic. 0007
Avoid contact with the skin, eyes or
clo thing. 0007
Do not lean overth e batter y. 0007
Do not inhale battery gases. 0007
Keep children away from the batter y. 0007
Immedia tely rinse battery acid off thor‐
oughly with plenty of clean water and
seek medical attention immediately. 434
Breakdown assi stance

000E
NO
TEDama getothe battery from over‐
vo ltage When
charging using a bat tery charge r with‐
out a maximum charging voltage, the battery
or the on-board electronics may be damaged. 0007
Only use battery charge rs with a maxi‐
mum charging voltage of 14.4 V. All
other vehicles
When charging the battery and during starting
assis tance, al ways use the jump-s tart connec‐
tion point in the engine compartment.
000E NO
TEDamaging the battery thro ugh
ove rvoltage When using a battery
charge r without a maxi‐
mum charging voltage, the battery or the
ve hicle electronics may be damaged. 0007
Only use battery charge rs with a maxi‐
mum charging voltage of 14.8 V. 000A
WARNING Risk ofexplosion from hydro‐
ge nga s igniting
A battery generates hydrogen gas during the
ch arging process. If there is a short circuit or
spar ksstart toform ,th ere is a danger of the
hy drogen gas igniting. 0007
Make sure that the positive term inal of
th e connected battery does not come
into conta ct withvehicle parts. 0007
Never place me tal objects or tools on a
batter y. 0007
When connecting and disconnecting the
batter y,yo u must obse rveth e descri‐
bed order forth e battery clamps. 0007
When giving starting assis tance, al ways
make sure that you on lyconnect bat‐
te ry term inals with identical polarity. 0007
During starting assis tance, you must
obse rveth e described order for con‐
necting and disconnecting the jump
lead. 0007
Do not connect or disconnect the bat‐
te ry cla mp s while the engine is running. 000A
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. 0007
Avoid fire , naked flames, creating
spar ksand smoking. 0007
Make sure that there is suf ficient venti‐
lation du ring thech arging process and
during starting assis tance. 0007
Do not lean over a batter y. 000A
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 may be released. 0007
Alw aysth aw a frozen bat tery out first
before charging it or per form ing start‐
ing assis tance. 436
Breakdown assi stance

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

0009
Vehicles with automatic transmission: if
th e automatic transmission cann otbe shif‐
te dto position 005C, orthe multifunction dis‐
play in the instrument clus ter does not show
anything, ha vetheve hicle transpor tedaw ay
( 0013 page442). A towing vehicle with lift‐
ing equipment is requ ired forve hicle trans‐
por tation.
000E NO
TEDama gedue to to wing away at
ex cessively high speeds or over long dis‐
ta nces The driv
etra in could be damaged when tow‐
ing at excessively high speeds or over long
dis tances. 0007
Atowing speed of 50 km/h must not
be exc eeded. 0007
Atowing dis tance of 50 km must not be
exc eeded. 000A
WARNING Risk of accident when towing
a ve hicle which is too heavy
If th eve hicle being tow- star ted or towed
aw ay is heavier than the permissible gross
mass, thefo llowing situations can occur:
R theto wing eye may become de tach ed.
R the car/t railer combination may swer ve
or eve nove rturn. 0007
If ano ther vehicle is tow- star ted or
to we daw ay, its weight must not exceed
th e permissible gross mass of your own
ve hicle. If a
vehicle must be tow star ted or towe daw ay,
its permissible gross mass must not exceed the
permissible gross mass of theto wing vehicle. 0007
Information on the permissible gross mass of
th eve hicle can be found on theve hicle iden‐
tification plate (0013 page473). 0007
Vehicles with automatic transmission: do
not open the driver's door or front passenger
door, otherwise the automatic transmission
automatically shifts toposition 005D. 0007
Fittheto wing eye (0013 page444). 0007
Fasten theto w bar.
000E NO
TEDama gedue toincor rect connec‐
tion 0007
Only connect theto w rope or tow bar to
th eto wing eyes. 0007
Deactivate the automatic locking mechanism
(0013 page81). 0007
Do not activate the HOLD function. 0007
Deactivate tow- aw ay protection
(0013 page 99). 0007
Deactivate Active Brake Assi st
( 0013 page214). 0007
Vehicles with automatic transmission:
shift the automatic transmission toposition
005C. 0007
Vehicles with manual transmission: shift
to neutral 005C. 0007
Release the electric parking brake. Breakdown assis
tance 441

0007
Vehicles with manual transmission:
switch on the ignition, otherwise thesteering
wheel lock may engage. 000A
WARNING Risk of accident due tolimi‐
te d saf ety-re lated functions during the
to wing process
Saf ety-re lated functions are limited or no lon‐
ge rav ailable in thefo llowing situations:
R the ignition is switched off.
R the brake sy stem or po werst eering sys‐
te m is malfunctioning.
R the energy supply or the on-board electri‐
cal sy stem is malfunctioning.
When your vehicle is then towe daw ay, signif‐
icantly more ef fort may be requ ired tosteer
and brake than is no rmally requ ired. 0007
Use a tow bar. 0007
Make sure that thesteering wheel can
mo vefreely, before towing theve hicle
aw ay. 000E
NO
TEDama gedue toexcessive tracti ve
po wer If
yo u pull away sharpl y,the tractive po wer
may be too high and theve hicles could be
damaged. 0007
Pull away slowly and smoo thly. Loading the
vehicle for transport 0007
Obser vethe no tes on towing away
( 0013 page440). 0007
Connect theto w bar totheto wing eye in
order toload theve hicle.
0009 You can also attach theto w bar tothe trailer
hitch. 0007
Vehicles with automatic transmission:
shift the automatic transmission toposition
005C.
0009 Ve
hicles with automatic transmission:
th e automatic transmission may be loc ked in
position 005Dintheeve nt of dama getothe
electrical sy stem. Toshift to005C , pr ovide the on-board electrical sy
stem with po wer
( 0013 page 437). 0007
Vehicles with manual transmission: shift
to neutral. 0007
Load theve hicle onto the transpor ter. 0007
Vehicles with automatic transmission:
shift the automatic transmission toposition
005D. 0007
Vehicles with manual transmission:
engage firs t or reve rsege ar. 0007
Use the electric parking brake tosecure the
ve hicle against rolling away. 0007
Only secure theve hicle bythe wheels.
Ve hicles with ADS PLUS (Adaptive Damping
Sy stem PLUS) 000A
WARNING Risk of an accident when
transporting vehicles with Adaptive
Damping Sy stem PLUS
The reduced damping forc es on theve hicle
being transpor ted can cause theve hicle/
trailer combination tostart toswing. 442
Breakdown assis tance

0007
Remo vetheto wing eye. 0007
Have theve hicle checked at a qualified spe‐
cialist workshop. Electrical fuses
Note
s on electrical fuses 000A
WARNING Risk of accident and inju ry
due to ov erloaded lines
If yo u manipulate or bridge a faulty fuse or if
yo ure place it with a fuse with a higher
amperage, the electric line could be overloa‐
ded.
This could result in a fire. 0007
Alw aysre place faulty fuses with speci‐
fi ed new fuses conta iningthe cor rect
amperage. 000E
NO
TEDama gedue toincor rect fuses Electrical components or sy
stems may be
damaged byincor rect fuses, or their func‐
tionality may be significant lyimpaired. 0007
Only use fuses that ha vebeen appr oved
by Mercedes-Benz and which ha vethe
cor rect fuse rating. Blown fuses mu
stbe replaced with fuses of the
same rating, which you can recognise bythe col‐
our and fuse rating. The fuse ratings and fu rther
information tobe obser ved are lis ted in the fuse
assignment diagram.
Fu se assignment diag ram: onthe fuse box in
th e boot (0013 page447).
000E NO
TEDama geor malfunctions caused
by moisture Moisture may cause dama
getothe electrical
sy stem or cause it tomalfunction. 0007
When the fuse box is open, make sure
th at no moisture can enter the fuse
box. 0007
When closing the fuse box, make sure
th at the seal of the lid is positioned cor‐
re ctly on the fuse box. If
th e newly inser ted fuse also blo ws, ha vethe
cause traced and rectified at a qualified special‐
ist workshop.
Ensure thefo llowing before replacing a fuse:
R The vehicle is secured against rolling away
R All electrical consumers are switched off
R The ignition is switched off
The electrical fuses are located in various fuse
bo xes:
R Fuse box in the engine compartment on the
driver's side (0013 page446)
R Fuse box on the driver's side of the cockpit
(0013 page447)
R Fuse box in the front passenger foot we ll
(0013 page447)
R Fuse box in the boot on theright-hand side
of theve hicle when vie wed in the direction of
tra vel (0013 page447) Breakd
own assi stance 445

Opening and closing
the fuse box in the
engine compa rtment Re
quirements:
R A dry clo thand a sc rewdriver are available.
Obse rveth e no tes on electrical fuses
(0013 page445).
Opening 000A
WARNING Risk of inju ryfrom using the
windscreen wipers while the engine bon‐
net is open
When the engine bonn etis open, and the
windscreen wipers are set in motion, you can
be trapped bythe wiper linkage. 0007
Alw ays switch off the windscreen wip‐
ers and ignition before opening the
engine bonn et. 0007
Turn clip 2on co ver1 aqu arter-turn to
th e left. 0007
Fold co ver1 up in the direction of the
ar row. 0007
Remo veany existing moisture from the fuse
box using a dry clo th. 0007
Loosen scr ews3 and remo vefuse box lid
4 from theto p.
Closing 0007
Check whe ther the seal is positioned cor‐
re ctly in lid 4. 446
Breakdown assis tance

Note
s on noise or unusual handling charac‐
te rist ics
While driving, pay attention tovibrations, noises
and unusual handling characteristics, e.g. pulling
to one side. This may indicate that the wheels or
tyres are damaged. If you suspect that a tyre is
defective, reduce your speed immediatel y.Stop
th eve hicle as soon as possible tocheck the
wheels and tyres for dama ge. Hidden tyre dam‐
age could also be causing the unusual handling
ch aracteristics. If youfind no signs of damage,
ha ve the tyres and wheels checked at a qualified
specialist workshop. Note
s onregular lyinspecting wheels and
tyres 000A
WARNING Risk of accident from dam‐
aged tyres
Dama ged tyres can cause tyre pressure loss.
As a result, you could lose cont rol of your
ve hicle. 0007
Check the tyres regularly for signs of
dama geand replace any damaged tyres
immediatel y. Car
ryout thefo llowing checks on all wheels reg‐
ularly, at least once a month or as requ ired, e.g.
prior toa long journey or driving off- road:
R Check the tyre pressure (0013 page449).
R Visually inspect tyres and wheels for dam‐
age.
R Check theva lve caps.
The valves must be pr otected against mois‐
ture and dirt bytheva lve caps appr oved
especially foryo ur vehicle byMercedes-Benz.
R Visual check of the tyre tread dep thand the
tyre contact su rface across the entire width.
The minimum tread dep thfor summer tyres
is 3 mm and for winter tyres 4 mm. Note
s on snow chains 000A
WARNING Risk of accident due toincor‐
re ct snow chain fitting
If yo u ha vefitted snow chains tothe front
wheels, the snow chains may drag against
th eve hicle body or chassis components.
This could cause damage totheve hicle or
th e tyres. 0007
Neverfit snow chains on the front
wheels. 0007
Only fit snow chains on there ar wheels
in pairs. 000E
NO
TEDama getothe wheel trim from fit‐
te d snow chains If sn
ow ch ains are fitted tosteel wheels, the
wheel trims can be damaged. 0007
Remo vethe wheel trims of steel wheels
before fitting snow chains. 448
Wheels and tyres

Obser
vethefo llowing no tes when using snow
ch ains:
R Snow ch ains are on ly permissible for cer tain
wheel/tyre combinations. You can obtain
information about this from a Mercedes-Benz
Service Cent re.
R For saf etyre asons, on lyuse sn ow chainsthat
ha ve been specifically appr ovedfo ryo ur
ve hicle byMercedes-Benz, or snow chains
with the same quality standard.
R If sn ow ch ains are fitted, the maximum per‐
missible speed is 50 km/h.
R Vehicles with Active Park ing Assis t:do
not use Active Parking Assist when snow
ch ains are fitted.
R Vehicles with le vel control: if snowchains
are fitted, only drive at raised vehicle le vel.
0009 You can permanently limit the maximum
ve hicle speed for driving with winter tyres
(0013 page218).
0009 You can deactivate ESP ®
to pull away
( 0013 page 207). This allo ws the wheels to
spin, achieving an increased driving forc e. Ty
re pressure Note
s on tyre pressure 000A
WARNING Risk of accident due toinsuf‐
fi cient or excessive tyre pressure
Underinfla ted or overinfla ted tyres pose the
fo llowing risks:
R The tyres may bur st, especially as the
load and vehicle speed increase.
R The tyres may wearexc essively and/or
une venly, which may greatlyimpair tyre
traction.
R The driving characteristics, as well as
st eering and braking, may be greatly
impaired. 0007
Comply with there commended tyre
pressure and check the tyre pressure of
all tyres including the spare wheel regu‐
larly:
R at least once a month
R when the load changes R
before embarking on a lon ger journey
R if operating conditions change, e.g. off-
ro ad driving 0007
Adjust the tyre pressure as necessar y. Driving wi
thtyre pressu rethat is too high or too
low can:
R Sho rten the service life of the tyres.
R Cause increased tyre damage.
R Adversely af fect driving characteristics and
th us driving saf ety, e.g. due toaquaplaning. 000A
WARNING Risk of accident from repea‐
te d tyre pressure drop
If th e tyre pressure drops repeatedl y,the
wheel, valve or tyre may be damaged.
Insuf ficient tyre pressure can cause the tyres
to bur st. 0007
Inspect the tyre for signs of fore ign
objects. Wheels and tyres
449