ECU MERCEDES-BENZ C-CLASS COUPE 2015 Repair Manual

If you wish to cancel th
erestart:
X Press the %button.
or X If the Tyrep ressure now OK?
Tyr ep ressure now OK? message
appears, press 9or: to select Can‐
Can‐
cel
cel .
X Press ato confirm.
The tyr epressure values store datthelast
restar twill continue to be monitored. Tyre pressure monitor
General notes If
at yrep ressure monito rsystem is fitted, the
vehicle's wheels have sensor sfitte dthatm oni-
to rt he tyrep ressure sinall four tyres. The tyre
pressure monito rwarn syou if th epressure
drops in on eormoreoft hetyres. The tyr epres-
sure monito ronlyf unction sifthecorresponding
sensor sare fitte dtoall wheels.
Information on tyr epressure sisshown in the
multifunction display. Afte rafew minute sof
driving ,the curren ttyrep ressure of each tyr eis
shown in the Service
Service menuoft hemultifunction
display; see illustration (example). For further informatio
nondisplaying this mes-
sage, refer to th e"Checkin gthe tyrep ressure
electronically" sectio n(Ypage 360).
Important safety notes It is th
edriver' sresponsibility to set th etyre
pressure to th erecommended col dtyrep res-
sure suitable for th eoperatin gsituation
(Y page 356). Not ethatthe correc ttyrep res-
sure for th ecurren toperatin gsituatio nmust
first be taught-in to th etyrep ressure monitor. If
there is asubstantial loss of pressure ,the warn-
ing threshold for th ewarning message is aligned to th
ereferenc evalues taught-in .Restart the
tyr ep ressure monito rafter adjusting to th ecold
tyr ep ressure (Y page 360). The curren tpres-
sure sare save dasnew reference values. This
will ensure that awarning message will only
appear if th etyrep ressure drops significantly.
The tyr epressure monito rdoes no twarn you of
an incorrectly set tyr epressure .Observ ethe
note sont herecommended tyr epressure
(Y page 356).
The tyr epressure monito risnotable to warn
you of asudde nloss of pressure ,e.g.ift hetyre
is penetrated by aforeign object .Intheevent of
as udde nloss of pressure ,brin gthe vehicle to a
halt by braking carefully. Avoid abrupt steering
manoeuvres.
The tyr epressure monito rhas ay ellow warning
lamp in th einstrumen tcluste rfor indicating a
pressure loss or malfunction. Dependin gonhow
th ew arning lamp flashes or light sup,at yre
pressure that is to olow or amalfunctio ninthe
tyr ep ressure monito risindicated:
R if th ewarning lamp is lit continuously, th etyre
pressure on on eormoret yres is significantly
to ol ow. The tyr epressure monito risnotmal-
functioning.
R if th ewarning lamp flashes for aroun da
minute and then remains lit constantly, the
tyr ep ressure monito rismalfunctioning.
In addition to th ewarning lamp, amessage
appear sinthemultifunction display. Observe
th ei nformatio nondisplay messages
(Y page 277).
It may tak euptotenminute sfor am alfunction
of th etyrep ressure monito rtobeindicated. A
malfunctio nwill be indicated by th etyrep res-
sure warning lamp flashin gfor approximately
on em inute and then remaining lit .When the
fault has been rectified, th etyrep ressure warn-
ing lamp goes out after you have driven for afew
minutes.
The tyr epressure values indicated by th eon-
boar dcomputer may differ from those meas-
ured at afilling statio nusingap ressure gauge.
The tyr epressure sshown by th eon-board com-
puter refer to those measured at sea level. At
high altitudes, th etyrep ressure values indica-
te dbyap ressure gauge are higher than those
shown by th eon-board computer. In this case,
do no treduc ethe tyrep ressures.
The operatio nofthetyrep ressure monito rcan
be affected by interferenc efromr adio transmit-
tin ge quipmen t(e.g. radio headphones, two-way Tyre pressure
359Wheels and tyres Z

Fitting
awheel
Preparing th evehicle X
Stop th evehicl eons olid, non-slippery and
leve lground.
X Apply th eelectric parking brak emanually.
X Mov ethe fron twheels to th estraight-ahead
position.
X Vehicles with manua
ltra nsmission:
depress th eclutch pedal fully and engage first
or revers egear.
X Vehicles with automatic transmission:
shif tthe automatic transmission to position
P.
X Mak esure that th evehicl eleve liss et to "Nor-
mal" on vehicles wit hAIRMATIC (Y page 195).
X Switc hoff th eengine.
X Vehicles without KEYLESS-GO: remove the
ke yf romt heignition lock.
X Vehicles with KEYLESS-GO start-function
or KEYLESS-GO: open thedriver' sdoor.
The on-board electronics no whave status 0.
This is th esam east hekeyh aving been
removed.
X Vehicles with KEYLESS-GO start-function
or KEYLESS-GO: remove theStart/Sto pbut-
to nf romt heignition loc k(Ypage 145).
X If included in th evehicl eequipment, remove
th et yre-chang etoolkit from th evehicle.
X Safeguar dthe vehicl eagainst rollin gaway.
i Apart from som
ecountry-specific variants,
vehicles are no tequipped wit htyre-changing
tools. Some tools for changing awhee lare
specific to th evehicle. Fo rmorei nformation
on whic htools are require dtoperforma
whee lcha ng eony our vehicle, consult aquali-
fie ds pecialist workshop.
Necessary tyre-changing tools may include,
for example:
R Jack
R Whee lchock
R Whee lwrench
R Centring pin Securing th
evehicle against rolling
away If your vehicl
eisequipped wit hawheelchock ,it
can be foun dinthetyre-chang etoolkit
(Y page 336).
The foldin gwhee lchock is an additional secur-
ing measure to safeguar dthe vehicl efromr oll-
ing away, for exampl ewhen changing awheel.
X Fold bot hplates upwards :.
X Fold out lower plate ;.
X Inser tthe lugs on th elower plat efully int othe
opening sinbase plate =. X
Plac echock soro ther suitable items under
th ef ront and rear of th ewhee ltha tisd iago-
nally opposit ethe whee lyou wish to change.
Raising th evehicle G
WARNING
If you do no tposition th ejackc orre ctly at the
appropriat ejackin gpointoft hevehicle, the
jac kc ould ti poverw itht he vehicl eraised.
Ther eisar iskofi njury.
Only position th ejac katt heappropriat ejack-
ing poin tofthevehicle. The base of th ejack 362
Changing
awheelWheels and ty res

must be positioned vertically, directly under
the jacking point of the vehicle.
Observe the following when raising the vehi- cle:
R only use the vehicle-specifi cjack that has
been tested and approved by Mercedes-Benz
to rais ethe vehicle. If the jack is used incor-
rectly, it could tip over while the vehicl eis
raised.
R the jack is designed only to rais eand hold the
vehicl efor as hort time while awhee lisb eing
changed. It is not permissibl etouse it to per-
form maintenance work under the vehicle.
R avoi dchanging the whee lonuphill and down-
hill slopes.
R before raising the vehicle, safeguard it from
rolling awaybya pplying the parking brake and
positioning whee lchocks. Do not release the
parking brake while the vehicl eisraised.
R the jack must be placed on afirm, flat and
non-slip surface. On aloose surface, alarge,
flat load-bearing underlay must be used .Ona
slippery surface, anon-slip underlay must be
used ,e.g. rubber mats.
R do not use wooden blocks or similar objects
as ajack underlay.O therwise, the jack willn ot
be abletoa chieve its load-bearing capacity
due to the restricted height.
R make sure that the distance betwee nthe
underside of the tyres and the ground does
not exceed 3cm.
R never place yourh ands or feet under the
raised vehicle.
R do not lie under the vehicle.
R do not start the engine when the vehicl eis
raised.
R do not open or close adoor or the boot lid
when the vehicl eisraised.
R make sure that no persons are present in the
vehicl ewhen the vehicl eisraised.
Vehicles with light-alloy wheels and hub
caps: the whee lbolts are covered by ahub cap.
Before you can unscrew the whee lbolts, you
must remove the hub cap. Two different variants
can be fitted. Vehicles with plastic hub cap:
X To remove: turn the centre cover of hub
cap :anti-clockwis eand remove.
X To fit: before fitting, ensure that hub cap :is
in the open position. To do this, turn the
centre cover anti-clockwise.
X Position hub cap :and turn the centre cover
clockwise until hub cap :engage sphysically
and audibly.
X Make sure that hub cap :is fitted securely. Vehicles with aluminium hub cap:
X To remove: take socket;and whee lwrench
= from the vehicl etool kit (Y page 336).
X Position socket ;on hub cap :.
X Position whee lwrench =on socket ;.
X Using whee lwrench =,turn hub cap :anti-
clockwise and remove it.
X To fit: before fitting, check hub cap :and
the whee larea for dirt and clean if necessary.
X Put hub cap :in position and turn until it is in
the right position.
X Position socket ;on hub cap :.
X Attach whee lwrench =to socket ;and
tighten hub cap :.
The tightening torque must be 25 Nm. Changing
awheel
363Wheelsa nd tyres Z

Notes on the vehicle equipment
–always fit the
vehicle:
R with tyres of the same size across an axle
(left/right)
R with the same type of tyres at agiven time
(summer tyres, winter tyres, MOExtended
tyres)
Exception: it is permissible to fit adifferent
type or make in the event of aflat tyre.
Observe the "MOExtended tyres (tyres with
run-flat characteristics)" section
(Y page 337).
Vehicles with MOExtended tyres are not equip-
ped with aTIREFIT kit at the factory. It is there-
fore recommended that you additionally equip
yourv ehicle with aTIREFIT kit if you fit tyres that
do not feature run-flat characteristics, e.g. win-
ter tyres. ATIREFIT kit can be obtained from a
qualifieds pecialist workshop. Emergencys
pare wheel Important safety notes
G
WARNING
The wheel/tyre dimensions and the tyre type of the spare wheel/emergency spare wheel
and the wheel to be replaced may differ. Fit-
ting aspare wheel/emergency spare wheel
may severely impairt he driving characteris-
tics. There is arisk of accident.
To prevent hazardou ssituations:
R Adapt yourd riving style accordingly and
drive carefully.
R Never fit more than one spare wheel/emer-
gency spare wheel if the dimensions are
different to those of the wheel being
replaced.
R Only use aspare wheel/emergency spare
wheel briefly if the dimensions are different to those of the wheel being replaced.
R Do not switch off ESP ®
.
R Have the spare wheel/emergency spare
wheel in questionr eplaced at the nearest
qualifieds pecialist workshop. Make sure
that the wheel/tyre dimensions and tyre
type are correct. When using an emergency spare wheel or spare
wheel of adifferent size, you must not exceed
the maximum speed of 80 km/h.
Snow chains must not be fitted to emergency
spare wheels. General notes
You can ask for information regarding permitted
emergency spare wheelsataM ercedes-Benz
Service Centre.
You shouldr egularly check the pressure of all
yourt yres, including the emergency spare
wheel,p articularly prior to long trips, and cor-
rect the pressure as necessary (Y page 356).
The valueont he wheel is valid.
An emergency spare wheel may also be fitted
against the direction of rotation. Observe the
time restriction on use as well as the speed lim- itation specifie donthe emergency spare wheel.
Replace the tyres after six years at the latest,
regardless of wear. This also applies to the
emergency spare wheel.
If you are driving with the emergency spare
wheel fitted, the tyre pressure loss warning sys- tem or the tyre pressure monitor cannot func-
tion reliably.O nly restart the tyre pressure loss
warning system or tyre pressure monitor when
the defective wheel has been replaced with a
new wheel.
Vehicles with tyre pressure monitor: after
fitting an emergency spare wheel,t he system
may still display the tyre pressure of the
removed wheel for afew minutes. The valued is-
played for the position where the emergency
spare wheel is fitted is not the same as the cur- rent tyre pressure of the emergency spare
wheel. Removing the emergencys
pare wheel
The emergency spare wheel is secured in the
emergency spare wheel bag in the boot.
X Open the boot.
X Detach the fastening straps.
X Unhook retaining spring hooks of fastening
straps from the retainers.
X Remove the emergency spare wheel bag with
the emergency spare wheel.
X Open the bag and remove the emergency
spare wheel. Emergency spare wheel
367Wheelsand tyres Z