BMW M3 SEDAN Owner's Manual page 337

On a slight downhill gradient
If you need to change a wheel on a slight down‐
hill grade, place chocks and other suitable ob‐
jects, for instance rocks, under the wheels of
both the front and rear axles against the rolling
direction.
Lug bolt lock
Concept
The wheel lug bolts have a special coding. The
lug bolts can only be released with the adapter
which matches the coding.
Overview
The adapter of the lug bolt lock is in the onboard
vehicle tool kit or in a storage compartment close
to the onboard vehicle tool kit.
▷ Lug lock bolt, arrow 1.
▷ Adapter, arrow 2.
Unscrewing
1. Attach the adapter to the lug lock bolt.
2. Unscrew the lug lock bolt.
Online Edition for Part no. 01405A1E4B0 - X/20
Wheels and tires
3. Remove the adapter after unscrewing the lug
bolt.
Screwing on
1. Attach the adapter to the lug lock bolt. If nec‐
essary, turn the adapter until it fits on the lug
lock bolt.
2. Screw on the lug lock bolt. The tightening
torque is 140 Nm.
3. Remove the adapter and stow it after screw‐
ing on the lug bolt.
Preparing the vehicle
▷ Park the vehicle on solid and non-slip ground
at a safe distance from traffic.
▷ Switch on the hazard warning system.
▷ Set the parking brake.
▷ Engage a gear or move the selector lever to
position P.
▷ As soon as permitted by the traffic flow, have
all vehicle occupants get out of the vehicle
and ensure that they remain outside the im‐
mediate area in a safe place, such as behind a
guardrail.
▷ Depending on the vehicle equipment, get
wheel change tools and, if necessary, the
emergency wheel from the vehicle.
▷ If necessary, set up a warning triangle or port‐
able hazard warning light at an appropriate
distance.
▷ Secure the vehicle additionally against rolling.
▷ Loosen the lug bolts a half turn.
MOBILITY
337