Audi 100 Quattro Owner's Manual page 133

The hexagonal socket in the screwdriver
handle has been designed to facilitate
removing and installing the wheel bolts.
To prevent personal injury, always
remove the detachable blade w hen using
the screwdriver handle for this purpose.
WARNING
The screw driver handle must not be
used to loosen or tighten wheel bolts.
A plastic pin is provided to make it easier
to change a wheel. Inserting the pin in
the bolt hole assures that the holes in the
wheel are in line with the threaded holes
in the wheel hub. See page 134.
DO-IT-YOURSELF SERVICE
131