Volvo XC90 Owner's Manual page 178

06 Starting and driving
Detachable towbar*
3. Turn the locking wheel down fully, until it
comes to a stop. Hold it in this position
while pulling the towbar rearward and
upward.
06
WARNING
Secure the towbar safely if it is stored in
the car, see page 171.
*
176
Option/accessory, for more information, see Introduction.
4. Push on the protective cover.