Volvo C30 Owner's Manual page 171

NOTE
On certain cars with fitted towbar the towing
eye cannot be secured in the rear mounting.
In which case, secure the tow rope in the
towbar.
For this reason it is advisable to store the
towbar's towball in the car, see page 175.
Recovery
Call a recovery service for recovery assistance.
The car must always be towed with the wheels
rolling forward.
IMPORTANT
Cars with automatic gearbox must only be
towed with drive wheels raised from the
road.
06 Starting and driving
Towing and recovery
06
171