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:
Fuse box in the passenger compartment, behind the plastic cover, driver's
side
This fuse box is located behind the plastic
cover below the steering wheel. When replacing
a blown fuse, be sure to replace it with a
new one of the same color and amperage (written
on the fuse) ...
Introduction
Volvo advises you to follow the maintenance
program outlined in the Warranty and Service
Records Information booklet. This maintenance
program contains inspections and services
necessary for t ...
DRIVING DYNAMICS: POWERTRAINS
All C30s are front-wheel drive, with the transverse engine design improving
space efficiency. It also improves safety by creating a generous crumple zone in
the engine compartment. The five-cylinder ...
