The car is equipped with two brake circuits. If one brake circuit is damaged then this will mean that the brakes engage at a deeper level and higher pedal pressure is needed to produce the normal braking effect.
The driver's brake pedal pressure is assisted by a brake servo.
The brake servo only works when the engine is running.
If the brake is used when the engine is switched off then the pedal will feel stiff and a higher pedal pressure must be used to brake the car.
In very hilly terrain or when driving with a heavy load the brakes can be relieved by using engine braking. Engine braking is most efficiently used if the same gear is used downhill as up.
For more general information on heavy loads on the car, see Engine oil - adverse driving conditions.
Cleaning the brake discs
Coatings of dirt and water on the brake discs may result in delayed brake function. With wet road surfaces, prior to long-stay parking and after the car has been washed, it is advisable to carry out cleaning by braking gently for a short period while driving.
To keep the car as safe and reliable as possible, follow the Volvo service intervals as specified in the Service and Warranty Booklet.
The wear on the brake system's components must be checked regularly.
Contact a workshop for information about the procedure or engage a workshop to carry out the inspection - an authorised Volvo workshop is recommended.
Symbols and messages
Constant glow – Check the brake fluid level. If the level is low, fill with brake fluid and check for the cause of the brake fluid loss.
Constant glow for 2 seconds when the engine is started - automatic function check.
If and illuminate at the same time, there may be a fault in the brake system.
If the level in the brake fluid reservoir is normal at this stage, drive carefully to the nearest workshop and have the brake system checked - an authorised Volvo workshop is recommended.
If the brake fluid is below the MIN level in the brake fluid reservoir, do not drive further before topping up the brake fluid.
The reason for the loss of brake fluid must be investigated.