Brake support systems Acceleration slip regulation (ASR) ASR reduces the drive output if wheelspin occurs and adapts the output to suit the road surface conditions → page 132. The ASR makes it easier to pull away, accelerate, and drive up hills. Brake support systems These braking support systems can help the driv- er in critical driving or braking situations. The braking support systems operate only within the limits of the respective system and may not be able to control the vehicle in every dangerous driving or braking situation. The driver is always responsible for all driving tasks → .
Anti-lock brake system (ABS) ABS prevents the wheels from locking during braking so that the vehicle can still be steered → page 132. Brake assist system (BAS) BAS can help to reduce the stopping distance. The brake assist system reinforces the braking force when the driver depresses the brake pedal quickly in an emergency situation. Drive with brake support systems The brake support systems is activated automati- cally when the engine is running and no special operation is required. If the pressure on the brake pedal is reduced, the BAS will be switched off. The brake pedal may move or noises may occur while the brake support systems are performing a control intervention.
Continue to brake with the necessary force. Maintain consistent pressure on the brake pedal. If necessary, steer the vehicle after depressing the brake pedal. Electronic differential lock (EDS and XDS) EDS brakes a spinning wheel automatically and distributes the drive force to the other drive wheels. Tips for brake support systems EDS switches itself off automatically in case of excessive load to prevent overheating of the brake. It switches back on automatically once the brake has cooled down. If you suspect a system malfunction, refer to the following tips: – The ESC, ABS and ASR can only function prop- erly if all four wheels are fitted with the cor- rect tyres.
Variances in tyre rolling circumfer- ence can lead to unintended reduction in en- gine power. XDS is an extension of the electronic differential lock and improves traction by braking interven- tions in order to keep the vehicle on its intended course. – If the ABS fails, ESC, ASR and EDS will also cease to function. Automatic anti-collision braking system The automatic anti-collision braking system pro- vides driver support by automatically applying brake intervention in the event of a collision, re- ducing the risk of skidding and subsequent colli- sions during the accident. The status of the brake functions is checked au- tomatically when the ignition is switched on.
The indicator lamps light up briefly and then go out again. If an indicator lamp remains lit up, there is a fault. Go to a suitably qualified workshop im- mediately and have the system checked. Volks- wagen recommends using a Volkswagen dealer- ship. The system automatically triggers braking if the airbag control unit detects a collision in an acci- dent situation. As long as the essential systems remain undam- aged and functional during the collision, the brake support systems will be triggered auto- matically. Electronic stability control (ESC) ESC control intervention to reduce the risk of skidding and improve driving stability → . ESC is always in the enabled state.
In the event of a collision, the following actions will deactivate the automatic braking system: – If the accelerator is depressed. 182.5C1.TRO.74 – If brake pressure applied when the brake pedal is depressed exceeds the braking interventions of the system. Parking and manoeuvring 131