The brake assist system (BAS1) helps to increase brake force during braking, and can thereby shorten the braking distance.
The system detects the way in which the driver brakes and increases brake force where necessary. The brake force can be boosted up to the level when the ABS system is engaged. The function is suspended when the pressure on the brake pedal decreases.
When BAS is activated the brake pedal lowers slightly more than usual, depress (hold) the brake pedal as long as necessary.
When the brake pedal is released, all braking ceases.