Loosening/tightening wheel boltsFig. 183
Changing a wheel: Loosening the
wheel bolts
Before removing the wheel bolts, the caps for the wheel bolts must be pulled
off.
Release
›
Push the wheel wrench onto the wheel bolt until it locks into place.
Use the appropriate adapter for undoing the anti-theft wheel bolts » page 184.
›
Grasp the end of the wrench and turn the bolt about one turn in the direction
of the arrow » Fig. 183.
Tightening
›
Push the wheel wrench onto the wheel bolt until it locks into place.
Use the appropriate adapter for tightening the anti-theft wheel bolts
» page 184 .
›
Grasp the end of the wrench and turn the bolt against the direction of the
arrow » Fig. 183 , until it is tight.
After tightening the wheel bolts, the covering caps must be replaced.
WARNINGIf it proves difficult to undo the bolts, carefully apply pressure to the end of
the wrench with your foot. Keep hold of the vehicle when doing so, and
make sure you keep your footing.Raising the vehicleFig. 184
Jacking points for positioning
lifting jack
Fig. 185
Principle sketch: Attach lifting jack
Use the jack from the tool kit to raise the vehicle.
Position the car jack at the jacking point closest to the flat tyre .
The mounting points are located directly below the mark on the lower beam
» Fig. 184 .
›
Support the base plate of the jack with its full area resting on level ground
and ensure that the jack is located in a vertical position at the jacking point
» Fig. 185 -
.
›
Position the lifting jack below the jacking point with the crank and move it up
until its claw encloses the web » Fig. 185 -
.
›
Continue turning up the jack until the wheel is just about lifted off the
ground.
185Emergency equipment and self-help
WARNING■If the wheel has to be changed on a slope, first of all block the opposite
wheel with a stone or similar object to prevent the vehicle from unexpect-
edly rolling away.■
Secure the base plate of the lifting jack with suitable means to prevent
possible moving. A soft and slippery ground under the base plate may move
the lifting jack, causing the vehicle to fall down. It is therefore always nec-
essary to place the lifting jack on a solid surface or use a wide and stable
base. If the surface is smooth, such as on cobbled stones, tiled floor, etc.,
use a non-slip base (e.g. a rubber foot mat).
■
Only attach the lifting jack to the attachment points provided for this pur-
pose.
■
Always raise the vehicle with the doors closed.
■
Never position any body parts, such as arms or legs under the vehicle,
while the vehicle is raised with a lifting jack.
■
When the vehicle is raised, never start the engine.
CAUTION
It is important to ensure that the jack is correctly attached to the web of the
lower fork leg - risk of damage to the vehicle.
Remove the wheel / fix
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 wheel and slightly screw on the wheel bolts.
›
Lower the vehicle.
›
Tighten the wheel bolts opposite each other using the wheel wrench (alter-
nating crosswise). 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 178 .
All bolts must be clean and must turn easily.
If it is established when changing a wheel that the wheel bolts are corroded and difficult to move, then these must be replaced.
Under no circumstances grease or oil the wheel bolts.WARNINGUndo the wheel bolts only a little (about one turn) as long as the vehicle
has not yet been jacked up. Otherwise the wheel could become loose and
fall off.
Follow-up tasks
After changing the wheel, the following work must be carried out.
›
Stow the replaced wheel in the wheel well and secure it with a special nut.
›
Stow the tool kit in the space provided and secure using the band.
›
Check the tyre pressure on the fitted 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 141.
Replace the damaged wheel or consult a specialist garage about repair op-
tions.
The prescribed tightening torque of the wheel bolts is 120 Nm.
WARNING■
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.■
Drive cautiously and only at a moderate speed until the tightening torque
has been checked.
Puncture repair kit
Introduction
This chapter contains information on the following subjects:
Components of the puncture repair kits
187
General information
187
186Do-it-yourself
