2015 MERCEDES-BENZ C-CLASS COUPE fuel pressure

G
WARNING
If the required tyre pressure is not reached
after driving for ashort period, the tyre is too
badly damaged. The tyre sealant cannot
repair the tyre in this instance. Damaged tyres and atyre pressure that is too low can signif-
icantly impair the vehicle's braking and driv-
ing characteristics. There is arisk of accident.
Do not continue driving. Contact aqualified
specialist workshop.
i In yourv
ehicle, you willf indasticker with
the Mercedes-Benz Service24h telephone
number, e.g. on the B-pillar on the driver's
side.
X Correct the tyre pressure if it is still at least
130 kPa (1.3 bar/19 psi) .See the tyre pres-
sure table on the fuel filler flap for values.
X To increase the tyre pressure: switch on
the tyre inflation compressor. X
To reduce the tyre pressure: depress pres-
sure release button :next to pressure
gauge ;.
X When the tyre pressure is correct, unscrew
the filler hose from the valve of the sealed
tyre.
X Screw the valve cap onto the tyre valve of the
sealed tyre. X
To remove the tyre sealant bottle from the
tyre inflation compressor, press together the
locking tabs on the yellow cap.
X Pullt he tyre sealant bottle out of the tyre
inflation compressor.
The filler hose stays on the tyre sealant bottle.
X Drive to the neares tqualified specialist work-
shop and have the tyre changed there.
X Have the tyre sealant bottle and the filler hose
replaced as soon as possible at aqualified
specialist workshop.
X Have the tyre sealant bottle replaced every
four years at aqualified specialist workshop. Battery (vehicle)
12
Vb attery -important safety notes
Work on the battery ,e.g. removing or fitting,
requires specialist knowledge and the use of
special tools. Therefore, alwaysh ave work on
the battery carrie dout at aqualified specialist
workshop. G
WARNING
Work carrie dout incorrectly on the battery
can lead, for example, to ashort circui tand
thus damage the vehicl eelectronics. This can
leadtof unction restrictions applying to
safety-relevant systems ,e.g the lighting sys-
tem, the ABS (anti-lock braking system) or the
ESP ®
(Electronic Stability Program). The oper-
ating safety of yourv ehiclemay be restricted. Battery (vehicle)
341Breakdown assistance
Z

Important safety notes
G
WARNING
If wheels and tyres of th ewrong siz eare used,
th ew hee lbrakes or suspension components
may be damaged. Ther eisariskofana cci-
dent.
Always replace wheels and tyres wit hthose
that fulfil th especification softheoriginal
part.
When replacing wheels, mak esuretof it the
correct:
R designation
R type
When replacing tyres, mak esuretof it the
correct:
R designation
R manufacturer
R type G
WARNING
Af lat tyr eseverely impairs th edriving ,steer-
ing and braking characteristics of th evehicle.
Ther eisar iskofa ccident.
Tyre swithout run-flat characteristics:
R do no tdrivew ithaf lat tyre.
R immediately replace th eflat tyr ewithy our
emergenc yspar ew hee lors parew heel, or
consult aqualified specialist workshop.
Tyre swithr un-flat characteristics:
R pay attention to th einformation and warn-
ing notice sonMOExtended tyres (tyres
wit hrun-flat characteristics).
Accessories that are no tapprove dfor your vehi-
cle by Mercedes-Ben zorare notbein gused cor-
rectl ycan impair th eoperating safety.
Before purchasing and usin gnon-ap proved
accessories, visit aqualified specialist work-
sho pand enquir eabout:
R suitability
R legal stipulations
R factory recommendations Further information regarding wheels and tyres
can be foun
dunder "Wheel/tyre combinations"
(Y page 366).
You can ask for information regarding permitted
wheel-tyre combination sataMercedes-Benz
Service Centre.
Information on tyr epressur ecan be found:
R in th etyrep ressur etable in th efuel filler flap
(Y page 167)
R under "Tyre pressure" (Y page 356)
Modification wor konthebrak esystem and
wheels is no tpermitted. The use of spacers or
brak edust shields is no tpermitted. This inva-
lidates th egeneral operating permit for th evehi-
cle.
i Further information on wheels and tyres can
be obtained at any qualified specialist work-
shop. Operation
Information on driving
Chec kthe tyrep ressures when th evehicl eis
heavily laden and adjust prio rtoatrip.
While driving ,pay attention to vibrations, noises
and unusual handlin gcharacteristics ,e.g.p ull-
ing to on eside .This may indicat ethatthe
wheels or tyres are damaged. If you suspec tthat
at yreisd efective, reduce your spee dimmedi-
ately. Stop th evehicl eass oonasp ossible to
chec kthe wheels and tyres for damage. Hidden
tyr ed amag ecould also be causing th eunusual
handlin gcharacteristics .Ifyou fin dnos ignsof
damage, hav ethe tyres and wheels checke data
qualified specialist workshop.
When parking your vehicle, mak esuren otto
squas hthe tyres idewalls. If this canno tbeavoi-
ded, driv eslowly ove robstacles, e.g. kerbs ,and
only at an obtuse angle. You could otherwise
damag ethe whee lrim sa nd tyres. Notes on high performance tyres
G
WARNING
Due to th especial tyr etread in combination
wit hthe optimised rubber compound ,the re is
an increased ris kofaquaplaning and skidding
on adamp or wet road surface. Tyre gri pis
also noticeably reduce datlow outside tem- Operation
353Wheels and ty res
Z

G
WARNING
If you fit unsuitabl eaccessories onto tyre
valves, the tyre valve smay be overloadeda nd
malfunction, which can caus etyre pressure
loss. Due to their design, retrofitted tyre pres-
sure monitors keep the tyre valve open. This
can alsor esult in tyre pressure loss. There is a
risk of accident.
Only screw standard valve caps or valve caps
specifically provided by Mercedes-Benz for
yourv ehicleonto the tyre valve. G
WARNING
If the tyre pressure drops repeatedly ,the
wheel, valve or tyre may be damaged. Tyre
pressure that is too low may result in atyre
blow-out. There is arisk of accident.
R Check the tyre for foreig nobjects.
R Check whethe rthe whee lislosing air or the
valve is leaking.
If you are unable to rectify the damage, con-
tact aqualified specialist workshop. H
Environmental note
Check the tyre pressure regularly, at least
every 14 days.
The recommende dtyre pressures for various
operating conditions can be found in the tyre
pressure table on the fuel filler flap
(Y page1 67).
Operation with an emergency spare wheel:
information on operation with an emergency
spar ewhee lcan be found in the genera lnotes in
the "Emergency spar ewheel" section
(Y page3 67).
Operation with atrailer: the applicable value
for the rear axle is the maximu mtyre pressure
valu estated in the table insid ethe fuel filler flap.
Additionally, the tyre pressure table may also
state tyre pressures for different loadc ondi-
tions. These are defined in the table as different numbers of passengers and amounts of lug-
gage .The actua lnumber of seats may vary ;for
more information, please refer to the vehicle's
registration documents.
If tyre sizes are not specified ,the tyre pressures
stated on the tyre pressure table apply for all
tyres approved for this vehicle. If
at yre size precedes atyre pressure, the fol-
lowing tyre pressure information is only vali dfor
that tyre size.
Use asuitable pressure gauge to check the tyre
pressure. The outer appearance of atyre does
not permi tany reliablec onclusion about the tyre
pressure. On vehicles fitted with the electronic
tyre pressure monitor, the tyre pressure can be checked using the on-board computer.
If possible,o nly correct tyre pressures when the
tyres are cold.
The tyres are cold:
R if the vehicl ehas been parked with the tyres
out of direct sunlight for at least three hours
and
R if the vehicl ehas not been drive nfurther than
1.6 km
Depending on the ambient temperature, the
vehicl espee dand the loadont he tyres, the tyre
temperature and thus the tyre pressure changes
by approximatel y10k Pa (0.1 bar/1.5 psi) per
10 †. Take this into account when checking the
pressure of warm tyres. Only correct the tyre
pressure if it is too low for the current operating conditions.
Driving with tyre pressure that is too high or too
low can:
R shorten the service life of the tyres
R caus eincreased tyre damage
R have anegative effect on handling character-
istics and thus driving safety (e.g. aquaplan-
ing)
The tyre pressure values given for low loads are minimu mvalues which offer you good ride com-
fort characteristics.
However, you can alsou se the values given for
higher loads. These are permissible and willn ot
adversely affect the running of the vehicle.
This does not apply to vehicles towing atrailer. Tyre pressure
357Wheels and tyres Z

This improves the ride comfor
tofyour vehicle;
however, fuel consumption may increase
slightly. Tyrep
ressure loss warning system
General notes While the vehicle is in motion
,the tyre pressure
loss warning system monitors the set tyre pres-
sure using the rotational speed of the wheels.
This enables the system to detect significant
pressure loss in atyre. If the speed of rotation of
aw heel changes as aresult of aloss of pressure,
ac orresponding warning message will appear in
the multifunction display.
You can recognise the tyre pressure loss warn-
ing by the Run Flat Indicator active
Run Flat Indicator active
Restart with OK Restart with OK message which appears in
the Service
Service menu of the multifunction display.
Information on the message display can be
found in the "Restarting the tyre pressure loss
warning system" section (Y page 358).
Important safety notes The tyre pressure warning system does not warn
you of an incorrectly set tyre pressure. Observe the notes on the recommended tyre pressure
(Y page 356).
The tyre pressure loss warning does not replace the need to regularly check the tyre pressures.
An even loss of pressure on several tyres at the
same time cannot be detected by the tyre pres-
sure loss warning system.
The tyre pressure monitor is not able to warn
you of asudden loss of pressure, e.g. if the tyre
is penetrated by aforeign object .Inthe event of
as udden loss of pressure, bring the vehicle to a
halt by braking carefully. Avoid abrupt steering
manoeuvres.
The function of the tyre pressure loss warning
system is limited or delayed if:
R snow chains are fitted to your vehicle's tyres.
R road conditions are wintry.
R you are driving on sand or gravel.
R you adopt avery sporty driving style (corner-
ing at high speeds or driving with high rates of
acceleration).
R you are towing avery heavy or large trailer. R
you are driving with aheavy load (in the vehi-
cle or on the roof).
R
Restarting the tyrep ressureloss warn-
ing system Restart the tyre pressure loss warning system if
you have:
R changed the tyre pressure
R changed the wheels or tyres
R fitted new wheels or tyres
X Before restarting, make sure that the tyre
pressures are set properly on all four tyres for
the respective operating conditions. The rec-
ommended tyre pressures can be found in the
tyre pressure table on the fuel filler flap.
The tyre pressure loss warning system can
only give reliable warnings if you have set the correc ttyre pressure. If an incorrect tyre
pressure is set, these incorrect values will be
monitored.
X Observe the notes in the section on tyre pres-
sures (Y page 356).
X Make sure that the key is in position 2in the
ignition lock (Y page 145).
X Press òon the steerin gwheel to call up
the menu list.
X Press 9or: on the steerin gwheel to
select the Service Servicemenu.
X Confirm by pressing aon the steering
wheel.
X Select Tyre pressure
Tyre pressure with9 or:.
X Press ato confirm.
The Run
Run Flat
Flat Indicator
Indicator active
activeRestart
Restart
with OK
with OK message is shown in the multifunc-
tion display.
If you wish to confirm the restart: X Press the abutton.
The Tyre pressure now OK?
Tyre pressure now OK? message is
shown in the multifunction display.
X Select Yes
Yeswith 9 or:.
X Press ato confirm.
The Run Flat Indicator restarted
Run Flat Indicator restarted mes-
sage is shown in the multifunction display.
After ateach-in period, the tyre pressure loss
warning system will monitor the set tyre pres- sures of all four tyres. 358
Tyrep
ressureWheels and tyres

radios) that may be being operated in or near the
vehicle.
Checking the tyre pressure electroni-
cally X
Make sure that the key is in position 2in the
ignitio nlock (Y page145).
X Press òon the steering whee ltocall up
the menu list.
X Press 9or: on the steering whee lto
select the Service
Servicemenu.
X Confirm by pressing aon the steering
wheel.
X Select Tyre pressure
Tyre pressure with9 or:.
X Press ato confirm.
The multifunction display shows the current
tyre pressure of each wheel.
If the vehicl ewas parked for longer than
20 minutes ,the following message appears:
Tyre pressure swill be displayed
Tyre pressure swill be displayed
after afew minutes of driving
after afew minutes of driving.
After ateach-in period, the tyre pressure moni-
tor automatically detects new wheels or new
sensors. As long as acleara llocation of the tyre
pressure values to the individualw heels is not
possible, the Tyre Tyrepressure
pressure monitor
monitoractive
active
message is shown instead of the tyre pressure
display.T he tyre pressures are already being
monitored.
If an emergency spare whee lisfitted, for afew
minutes the system may continue to show the
tyre pressure of the whee lthat has been
removed .Ifthis occurs, note that the valu edis-
played for the position where the spare whee lis
fitted is not the same as the current tyre pres-
sure of the emergency spare wheel.
Warning message softhe tyre pressure
monitor If the tyre pressure monitor detects
apressure
loss in one or more tyres, awarning message is
shown in the multifunction display.T he yellow
tyre pressure warning lamp then lights up.
R If the Please correct tyre pressure
Please correct tyre pressure
message appears in the multifunction display,
the tyre pressure in at least one tyre is too
low.T he tyre pressure must be corrected
when the opportunity arises.
R If the Check Check tyre(s)
tyre(s) message appears in the
multifunction display,t he tyre pressure in at least one tyre has dropped significantly. The
tyres must be checked.
R If the Warning tyre defect Warning tyre defect message
appears in the multifunction display,t he tyre
pressure in at least one tyre has dropped sud- denly .The tyres must be checked.
Observe the instructions and safety notes in the display messages in the "Tyres" section
(Y page2 77).
If the whee lpositions on the vehicl eare inter-
changed ,the tyre pressures may be displayed
for the wrong positions for ashort time. After a
few minutes of driving, this is rectified and the
tyre pressures are displayed for the correct
positions.
Restarting the tyre pressure monitor When you restart the tyre pressure monitor, all
existing warning messages are deleted and the
warning lamp sgoout. The monitor uses the cur-
rently set tyre pressures as the reference values
for monitoring. In most cases, the tyre pressure monitor willa utomatically detect the new refer-
ence values after you have changed the tyre
pressure. However, you can alsos et reference
values manually as described here. The tyre
pressure monitor then monitors the new tyre
pressure values.
X Use the table on the insid eofthe fuel filler flap
to ensure that the tyre pressure is set cor-
rectly in all four tyres for the current operating
conditions.
Also observe the notes in the section on tyre
pressures (Y page356).
X Make sure that the key is in position 2in the
ignitio nlock (Y page145).
X Press òon the steering whee ltocall up
the menu list.
X Press 9or: on the steering whee lto
select the Service Servicemenu.
X Confirm by pressing aon the steering
wheel.
X Select Tyre pressure
Tyre pressure with9 or:.
X Press ato confirm.
The multifunction display shows the current
tyre pressure of each whee lortheTyre Tyre 360
Tyre pressureWheels and tyres

X
Tighten the wheel bolts evenly in acrosswise
pattern in the sequence indicated (: toA).
The specified tightening torque is 130 Nm.
X Turn the jack back to its initial position.
X Stow the jack and the rest of the tyre-change
tool kit in the boot again.
X Mercedes-AMG vehicles and vehicles
with AMG equipment:
insert the cover into
the outer sill.
X Check the air pressure of the newly fitted
wheel and adjust accordingly.
Observe the recommended tyre pressure
(Y page 356).
If you are driving with the emergenc yspare
wheel fitted, the tyre pressure loss warning sys-
tem or the tyre pressure monitor cannot func-
tion reliably .Only restart the tyre pressure loss
warning system or tyre pressure monitor when
the defective wheel has been replaced with a
new wheel.
Vehicles with atyrep ressur emonitor: all fit-
ted wheels must be equipped with functioning
sensors. Wheel-tyr
ecombination
You can ask for information regarding permitted wheel-tyre combinations at aMercedes-Benz
Servic eCentre.
! For safety reasons, Mercedes-Benz recom-
mends that you only use tyres and wheels
which have been approved by Mercedes-Benz specifically for your vehicle. These are specially adapted to the control
systems, such as ABS or ESP
®
and are
marked as follows:
R MO =Mercedes-Benz Original
R MOE =Mercedes-Benz Original Extended
(tyres featuring run-flat characteristics)
R MO1 =Mercedes-Benz Original (only cer-
tain AMG tyres)
Mercedes-Benz Original Extended tyres may
only be used on wheels that have been spe-
cifically approved by Mercedes-Benz.
Only use tyres, wheels or accessories tested
and approved by Mercedes-Benz.C ertain
characteristics, e.g. handling, vehicle noise
emissions or fuel consumption, may other-
wise be adversely affected. In addition, when
driving with aload, tyre dimension variations
could cause the tyres to come into contact
with the bodywork and axle components.T his
could result in damage to the tyres or the
vehicle.
Mercedes-Benz accepts no liability for dam-
age resulting from the use of tyres, wheels or accessories other than those tested and
approved.
Further information about wheels, tyres and
approved combinations can be obtained from
any qualified specialist workshop.
! Retreaded tyres are neither tested nor rec-
ommended by Mercedes-Benz,s ince previ-
ous damage cannot alway sbedetected on
retreaded tyres. As aresult, Mercedes-Benz
cannot guarantee vehicle safety if retreaded
tyres are fitted. Do not fit used tyres if you
have no information about their previous
usage.
! Large wheels: the lower the section width
for acertain wheel size, the lower the ride
comfor tisonp oor road surfaces. Roll comfort
and suspension comfor tare reduced and the
risk of damage to the wheels and tyres as a
result of driving over obstacles increases.
The recommended tyre pressures can be found
in the tyre pressure table on the fuel filler flap.
For further information on tyre pressure, see
(Y page 356). Check tyre pressures regularly
and only when the tyres are cold. 366
Wheel-tyr
ecombinationWheels and tyres