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Changing a wheel
332
Tire-mounting tools should not be used near
the valve. This could damage the electronic
components.
Only have tires changed at a qualified spe-
cialist workshop.
Always observe the instructions and safety
notes in the "Mounting a wheel" section
(
page 332).
Y
The wear patterns on the front and rear tires
differ, depending on the operating conditions.
Rotate the wheels before a clear wear pattern
has formed on the tires. Front tires typically
wear more on the shoulders and the rear tires in
the center.
On vehicles that have the same size front and
rear wheels, you can rotate the wheels accord-
ing to the intervals in the tire manufacturer's
warranty book in your vehicle documents. If no
warranty book is available, the tires should be
rotated every 3,000 to 6,000 miles (5,000 to
10,000 km). Depending on tire wear, this may
be required earlier. Do not change the direction
of wheel rotation.
Clean the contact surfaces of the wheel and the
brake disc thoroughly every time a wheel is rota-
ted. Check the tire pressure and, if necessary,
restart the tire pressure loss warning system
(
page 319) or the tire pressure monitor
Y
(
page 321).
Y
Direction of rotation
Tires with a specified direction of rotation have
additional benefits, e.g. if there is a risk of hydro-
planing. These advantages can only be gained if
the tires are installed corresponding to the
direction of rotation.
An arrow on the sidewall of the tire indicates its
correct direction of rotation.
Storing wheels
Store wheels that are not being used in a cool,
dry and preferably dark place. Protect the tires
from oil, grease, gasoline and diesel.
Mounting a wheel
Preparing the vehicle
Stop the vehicle on solid, non-slippery and
X
level ground.
Apply the electric parking brake manually.
X
Bring the front wheels into the straight-ahead
X
position.
Shift the transmission to position j.
X
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
SmartKey from the ignition lock.
Vehicles with KEYLESS-GO start-function
X
or KEYLESS-GO: open the driver's door.
The vehicle electronics are now in key posi-
tion u. 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 (
Make sure that the engine cannot be started
X
via your smartphone (
If included in the vehicle equipment, remove
X
the tire-change tool kit from the vehicle.
Safeguard the vehicle against rolling away.
X
Securing the vehicle to prevent it from
rolling away
If your vehicle is equipped with a wheel chock, it
can be found in the tire-change tool kit
(
page 296).
Y
The folding wheel chock is an additional safety
measure to prevent the vehicle from rolling
away, for example when changing a wheel.
page 164).
Y
page 124).
Y
page 126).
Y
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