Porsche 928 ST1991 Owner's Manual page 92

Lock-up wheel nuts
The wheels of your vehicle are theftproof by
means of a wheel nut lock. The wheel nut
lock consists of a wheel nut and a plug-on
sleeve with lock. The locking mechanism is
identical for all four wheel nuts. When taking
the vehicle to your Porsche dealer or to a
workshop for wheel or tire service, re-
member to leave one key with the service at-
tendant.
In case of loss, duplicate keys cannot be
furnished by your Porsche dealer. Do not
leave these keys in the vehicle. Keep them
in a safe place.
To unlock a wheel
1. Remove protective plastic cap from
wheel nut.
2. Insert key all the way and turn left about
3 0 ° .
3. Remove lock sleeve together with in-
serted key.
4. Replace protective plastic cap.
To lock a wheel
1. Remove protective plastic cap from
wheel nut using the hook from the tool kit.
2. Insert key, turn it back 30° to right and re-
move. Slide lock sleeve over wheel nut
until you feel it lock in.
3. Make sure that the edge of the lock sleeve
rests firmly against base of wheel nut.
4. Replace protective plastic cap.
To avoid unbalancing the wheels, always fit
the lockable wheel nut to the colored bolt be-
side the valve.
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