sons, Mercedes-Benz recommends that you
only use wheel bolts whic hhave been
approved for Mercedes-Benz vehicles and the
respective wheel. Other wheel bolts could
work loos eordamage the brake system.
Do not tighten the wheel bolts completely
while the vehicle is still jacked up. The vehicle
could topple off the jack. :
Whee lbolts for all wheels supplied by the
factory
2 Wheel bolts for the "Minispare" emer-
genc yspare wheel
! Always use wheel bolts ;to fit the col-
lapsible emergency spare wheel. Using
other wheel bolts to fit the collapsible
emergency spare wheel could damage the
brak esystem.
X Clea nthe wheel and wheel hub con tact
surfaces. X
Slid ethe emergenc yspare wheel onto the
centrin gpin and push it on. X
Tighten the wheel bolts until they are fin-
ger-tight.
X Unsc rewt he cen tring pin.
X Tighten the last wheel bol tuntil it is finger-
tight.
Lowerin gthe vehicle X
Place th eratchet ring spanner onto the
hexago nnut of the jack so that the letters
AB are visible.
X Turn the ratchet ring spanner until the vehi-
cle is once again standing firmly on the
ground.
X Place the jack to one side. X
Tighten the wheel bolts evenly in across-
wis epattern in the sequence indicated
(: toA ). The tightening torque must be
150 Nm. G
WARNING
Have the tightening torque checked immedi-
ately after awheel is changed. The wheels
coul dwork loose if they are not tightened to
at orqu eof150 Nm.
X Turn the jack back to its initia lposition and
stor eitt ogether with the rest of the tyre-
change tool kit in the luggage compart-
ment.
Vehicles with an emergenc yspare wheel:
X Wrap the faulty wheel in the protec tive film
included with the emergenc yspare wheel Flat ty
re
341Breakd ownassistance Z
detec
tthe new referen ce values after you
have changed th etyrep ressure.
i For an overview of the menus, see
(Y pag e238).
If you wis htodefinethe new reference values
manually:
X Use the tabl eonthe insid eofthe fuel filler
fla ptoe nsure that the tyre pressure is set
correctly in all four tyres for the current
operating conditions.
Also observe the notes in the section on
tyre pressures (Y page359).
X Make sure tha tthe key is in position 2in
the ignition lock.
X Press the =or; button on the steer-
ing wheel to selec tthe Service menu.
X Press the 9or: button to select
Tyre pressu re .
X Press the abutton.
The multifunction display shows the cur-
ren ttyre pressure of the individual tyres or
the Tyrepressures will be dis‐ played after a few minutes of driv‐
ing message.
X Press the :button.
The Usec urrent pressures as new reference values message appears in
th em ultifunction display.
If you wish to confirm the restart:
X Press the abutton.
The Tyre press. monito rrestarted message appears in th
emultifunction dis-
play.
After you have driven for afew minutes, the
system checks whether the curren ttyre
pressures are within the specified range.
The new tyre pressures are then accepted
as reference values and monitored.
If you wish to cancel the restart:
X Press the %button.
The tyre pressure values stored at the last
restart will continue to be monitored. Radio typ
eapproval for the tyr epres-
sur em onitor In certain countries,
aradio type approval for
the tyre pressure monitor may be required.
The radio type approval number for the tyre
pressure monitor can be found online at:
http://www.mercedes-benz.de/
betriebsanleitung. Changing
awheel Flat tyre
Th e" Breakdown ass istance" section
(Y pag e334) contain sinformation and notes
on how to dea lwith aflat tyre. It also provides
instructions on changing awhee lorf itting the
spar ewhee lore mergency spar ewheel. Interch
angin gthe wheels G
WARNING
Interchange th efront and rea rwheels only if
they hav ethe sam edimensions :for example
size, offset ,etc.
After every whee linterchange/change, have
the tightening torque checked at aqualified
specialist workshop that has the necessary
specialist knowledg eand tool stocarry out
the work required. Mercedes-Benz recom-
mends that you use aMercedes-Benz Service
Centr efor this purpose. In particular ,work
relevant to safet yoronsafety-related sys-
tems must be carried out at aqualified spe-
cialist workshop.
The wheel scould work loose if they are not
tightened to atorqu eof150 Nm.
For safety reasons, Mercedes- Benz recom-
mends that you only use wheel bolts of the
correct siz ewhich hav ebeen approved for
Mercedes-Ben zvehicles.
The wear patterns on the fron tand rea rtyres
differ ,dependin gontheopera tingconditions.
Interchange the wheels before aclear wear
pattern has formed on th etyres. Front tyres Changing
awheel
363Wheels and tyre s Z
