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On vehicles fitted with a tyre pressure mon-
itor, electronic components are located in the
wheel.
Tyre-fitting tools should not be applied in the
area of the valve, as this could damage the
electronic components.
Only have tyres changed at a qualified spe-
cialist workshop.
Interchanging the front and rear wheels of dif-
fering dimensions can render the general oper-
ating permit invalid.
Observe the instructions and safety notes in the
"Fitting a wheel" section (
The wear patterns on the front and rear tyres
differ depending on the operating conditions.
Interchange the wheels before a clear wear pat-
tern has formed on the tyres. Front tyres typi-
cally wear more on the shoulders, while rear
tyres wear more in the centre.
On vehicles that have front and rear wheels of
the same size, you can interchange the wheels
every 5,000 to 10,000 km depending on the
degree of tyre wear. Ensure the direction of
rotation is maintained.
Clean the contact surfaces of the wheel and the
brake disc thoroughly every time a wheel is
interchanged. Check the tyre pressure and, if
necessary, restart the tyre pressure loss warn-
ing system (
page 347) or the tyre pressure
Y
monitor (
page 349).
Y
Direction of rotation
Tyres with a specified direction of rotation have
additional benefits, e.g. if there is a risk of aqua-
planing. These advantages can only be gained if
the tyres are fitted corresponding to the direc-
tion of rotation.
An arrow on the sidewall of the tyre indicates its
correct direction of rotation.
Storing wheels
Store wheels in a cool, dry and preferably dark
place if they are not being used. Protect the
tyres against oil, grease, petrol and diesel.
page 351).
Y
Changing a wheel
Fitting a wheel
Preparing the vehicle
Stop the vehicle on solid, non-slippery and
X
level ground.
Apply the electric parking brake manually.
X
Move the front wheels to the straight-ahead
X
position.
Vehicles with manual transmission:
X
depress the clutch pedal fully and engage first
or reverse gear.
Vehicles with automatic transmission:
X
shift the transmission to position P.
Make sure that the vehicle level is set to "Nor-
X
mal" on vehicles with AIRMATIC (
Switch off the engine.
X
Vehicles without KEYLESS-GO: remove the
X
key from the ignition lock.
Vehicles with KEYLESS-GO start-function
X
or KEYLESS-GO: open the driver's door.
The vehicle electronics now have status 0.
This is the same as the key having been
removed.
Vehicles with KEYLESS-GO start function
X
or KEYLESS-GO: remove the Start/Stop but-
ton from the ignition lock (
If included in the vehicle equipment, remove
X
the tyre-change tool kit from the vehicle.
Safeguard the vehicle against rolling away.
X
i
Apart from some country-specific variants,
vehicles are not equipped with tyre-changing
tools. Some tools for changing a tyre are spe-
cific to the vehicle. For more information on
which tools are required to perform a wheel
change on your vehicle, consult a qualified
specialist workshop.
Necessary tyre-changing tools may include,
for example:
Jack
R
wheel chock
R
Wheel wrench
R
Centring pin
R
351
page 182).
Y
page 133).
Y
Z
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