See also:

Power brakes function only when the engine is running
The power brakes utilize vacuum pressure which is only created when the engine is running. Never let the vehicle roll to a stop with the engine switched off. If the power brakes are not working, co ...

Handling
• Check that the battery cables are correctly connected and tightened. • Never disconnect the battery when the engine is running (for example, when replacing the battery). • If the battery is ...

Changing coolant
Coolant reservoir Normally, the coolant does not need to be changed. If the system must be drained, consult a trained and qualified Volvo service technician. CAUTION • If necessary, top up th ...