Volvo XC90 2012 Owner's Manual page 172

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 165.
*
170
Option/accessory, for more information, see Introduction.
4. Push on the protective cover.