BMW Z4 Roadster Owner's Handbook Manual page 287

Thiefproof wheel studs
Principle
The wheel locking bolts have a special coding.
The blots can only be released with the adapter
that matches the coding.
Overview
The adapter of the thiefproof wheel studs can be
found in the on-board tool kit or in an oddments
tray in the on-board tool kit.
▷ Wheel stud, arrow 1.
▷ Adapter, arrow 2.
Unscrewing
1. Place the adapter on the wheel stud.
2. Unscrew the wheel stud.
3. After unscrewing the wheel stud, remove the
adapter again.
Screwing on
1. Place the adapter on the wheel stud. If nec‐
essary, turn the adapter until it fits on the
wheel stud.
2. Screw on the wheel stud. The tightening tor‐
que is 140 Nm.
3. After screwing on the wheel stud, remove the
adapter again and stow it.
Preparing the vehicle
▷ Park the vehicle on firm and non-slip ground
at a safe distance from traffic.
Wheels and tyres
Online Edition for Part no. xxx - X/18
▷ Switch on the hazard warning lights.
▷ Apply the parking brake.
▷ Engage a gear or select selector lever posi‐
tion P.
▷ As soon as the traffic permits, have all vehicle
occupants get out of the vehicle and guide
them out of the danger area, for example be‐
hind the crash barrier.
▷ Depending on the equipment, take the wheel
change tools and, if necessary, the emer‐
gency wheel out of the vehicle.
▷ If applicable, set up warning triangle or flash‐
ing light at the correct distance.
▷ Additionally protect the vehicle against rolling
away.
▷ Undo the wheel studs by half a turn.
Jacking points
The jacking points are located in the marked po‐
sitions.
MOBILITY
287