See also:

Towing a trailer
The maximum weights recommended by Volvo for trailers with brakes are shown in the table below. Recommended hitch tongue load: not more than 10% of the trailer's weight. The trailer load should ...

Keyless drive
Vehicles equipped with the optional Personal Car Communicator have the keyless drive function, see page 63 for detailed information. ...

Low battery voltage
If the battery voltage is too low, the parking brake cannot be applied or released. Connect an auxiliary battery if the battery voltage is too low, see page 114. ...