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:
Driving dynamics: engine
The second-generation, 2.4-litre, five-cylinder, diesel D5 is a cleaner and
more advanced version of the engine fitted to the outgoing XC70. It gives superb
performance (130mph) allied to fuel eco ...
Automatic transmission
P (Park)
Use this position when starting the engine or
parking the vehicle.
Never use P while the vehicle is in motion.
The parking brake should also be set whenever
the vehicle is parked.
...
Exterior lighting
Condensation may form temporarily on the
inside of the lenses of exterior lights such as
headlights, fog lights, or taillights. This is normal
and the lights are designed to withstand
moisture ...