See also:

Safety
Volvo is a renowned world leader in automotive safety, and the all-new Volvo S80 features a new generation of preventive and protective safety systems. The best way to protect the car occupants is ...

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. ...

Electrical system
General information 12-volt system with voltage controlled generator. Single wire system in which the chassis and engine block are used as conductors, grounded on the chassis. Battery If you ...