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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 direc-
tion of wheel rotation.
Clean the contact surfaces of the wheel and
the brake disc thoroughly every time a wheel
is rotated. Check the tire pressure and, if nec-
essary, restart the tire pressure loss warning
system (Canada only) or the tire pressure
monitor (USA only).
Direction of rotation
Tires with a specified direction of rotation have
additional benefits, e.g. if there is a risk of
hydroplaning. 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
X
Stop the vehicle on solid, non-slippery and
level ground.
X
Apply the electric parking brake manually.
X
Bring the front wheels into the straight-
ahead position.
X
Shift the transmission to position j.
X
Switch off the engine.
X
Vehicles without KEYLESS-GO: remove
the SmartKey from the ignition lock.
X
Vehicles with KEYLESS-GO start-func-
tion or KEYLESS-GO: open the driver's
door.
The vehicle electronics are now in position
u. This is the same as “key removed”.
X
Vehicles with KEYLESS-GO start-func-
tion or KEYLESS-GO: remove the Start/
Stop button from the ignition lock
(Y page 125).
X
Make sure that the engine cannot be started
via your smartphone (Y page 84).
X
If included in the vehicle equipment, remove
the tire-change tool kit from the vehicle.
X
Safeguard the vehicle against rolling away
(Y page 145).
i
Apart from certain country-specific varia-
tions, the vehicles are not equipped with a
tire-change tool kit. Some tools for changing
a wheel are specific 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 tire-changing tools can include,
for example:
R
Jack
R
Wheel chock
R
Lug wrench
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
(Y page 287).
The folding wheel chock is an additional safety
measure to prevent the vehicle from rolling
away, for example when changing a wheel.
326
Changing a wheel
Wheels and tires
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