Wheel boltsFig. 109
Remove the cap
Before removing the wheel bolts, remove the covering caps.
Pulling off
›
Push the extraction pliers » page 122 sufficiently far onto the cap until the
inner catches of the pliers are positioned at the collar of the cap.
›
Remove the cap in the direction of the arrow » Fig. 109.
Installing
›
Push the cap onto the wheel bolt up to the stop.
Changing a wheel
When changing a wheel, the following instructions must be followed.
›
Remove the full wheel trim or the caps of the wheel bolts.
›
First of all slacken the anti-theft wheel bolt and then the other wheel bolts.
›
Jack up the vehicle until the wheel that needs changing is clear of the
ground.
›
Unscrew the wheel bolts and place them on a clean surface (cloth, paper, etc.).
›
Remove the wheel carefully.
›
Attach the spare wheel and slightly screw on the wheel bolts.
›
Lower the vehicle.
›
Alternately tighten wheel bolts opposite (diagonally) with the wheel wrench.
Tighten the anti-theft wheel bolt last.
›
Replace the wheel trim or the caps.
When fitting unidirectional tyres, ensure that the direction of rotation is cor-
rect » page 120 .
WARNING■
Undo the wheel bolts only a little (about one turn) provided that the vehi-
cle has not yet been jacked up. Otherwise the wheel could become loose
and fall off.■
All bolts must be clean and must turn easily.
■
If it is established when changing a wheel that the wheel bolts are corro-
ded and difficult to move, then these must be replaced.
■
Under no circumstances grease or oil the wheel bolts!
Follow-up work
After changing the wheel, the following work must be carried out.
›
Stow and attach the replaced wheel in the spare wheel well using a special
bolt » page 123 .
›
Check the tyre pressure on the installed spare wheel as soon as possible.
›
Have the tightening torque of the wheel bolts checked with a torque
wrench as soon as possible.
After changing the wheel, the tyre pressure should be adjusted. In vehicles
with tyre pressure monitoring, save tyre pressure values » page 92.
Replace the damaged wheel or consult a specialist garage about repair op-
tions.
WARNINGInformation on the wheel bolts■The prescribed tightening torque of the wheel bolts for steel and light al-
loy wheels is 120 Nm.■
If the wheel bolts are tightened to a too low tightening torque, the rim
can come loose when the car is moving. A tightening torque which is too
high can damage the bolts and threads and this can result in permanent
deformation of the contact surfaces on the rim.
■
In case of incorrect treatment of the wheel bolts, the wheel can loosen
when the car is moving.
■
Drive cautiously and only at a moderate speed until the tightening torque
has been checked.
125Emergency equipment and self-help
