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, considerably higher pressure will be required on the brake pedal to compensate for the lack of power assistance. This can happen for example when towing your vehicle or if the engine is switched off when the vehicle is rolling. The brake pedal feels harder than usual.
See also:
How BLIS functions in daylight and darkness
Daylight
BLIS reacts to the shape of surrounding vehicles. The system is designed to help
detect motor vehicles such as cars, trucks, buses, motorcycles, etc.
Darkness
BLIS reacts to the headligh ...
Climate control maintenance
Special tools and equipment are required to
maintain and carry out repairs on the climate
system. Work of this type should only be done
by a trained and qualified Volvo service technician. ...
Headlight housing
The entire headlight housing must be lifted out
when replacing all front bulbs.
CAUTION
Never touch the glass of bulbs with your fingers.
Grease and oils from your fingers
vaporize in the he ...