The brake servo reduces the amount of pedal force the driver needs to apply when braking.
A two-stage brake servo with a highly sensitive response was developed for the Golf. Up to a brake pressure of about 45 bar, known as the comfort braking range, the braking force is boosted five-fold. If the driver presses the brake pedal more forcefully, the braking force is boosted by up to a factor of ten. The driver notices this by the fast braking response combined with a short pedal travel, a good progressive brake modulation and reduced braking effort up to the point at which the ABS is activated.