Advertisement

Advertisement

Braking and parking -> Braking assistance systems for Your Volkswagen Passat SUV Sixth Generation (2005-2010)

WARNING  
Wet brakes or brakes coated with ice or road salt react slower and need longer stopping  
distances.  
Carefully apply the brakes to test them.  
Always dry brakes and clean off ice and salt coatings with a few cautious brake  
applications when visibility, weather, road and traffic conditions permit.  
WARNING  
Driving when the brake booster is not working increases stopping distances and can cause  
accidents and serious personal injuries.  
Never let the vehicle coast when the engine is switched off.  
If the brake booster is not working (such as when the vehicle is being towed), a lot more  
pedal force is needed to slow down and stop.  
NOTICE  
Never “ride” the brakes by keeping your foot on the brake pedal when you do not want to  
brake. Constant pressure on the brake pedal can make the brakes overheat. Riding the brakes  
will substantially reduce braking performance, increase stopping distance, and can cause  
complete brake system failure.  
Before driving downhill, especially on hills that are long or steep, always reduce speed and  
shift into lower gear (manual or automatic transmission). This will let the vehicle use engine  
braking and reduce the load on the brakes. Otherwise, the brake system could overheat and  
possibly fail. Only use the brakes when you need them to slow the vehicle down more or to  
stop.  
When the front brakes are serviced, you should have the rear brake pads inspected at the same  
time. The wear of all brake pads should be visually checked regularly. The best way to check for brake  
pad wear is to have your authorized Volkswagen dealer or authorized Volkswagen Service Facility  
visually inspect the pads through the openings in the wheel rims or from underneath the vehicle. If  
necessary, the wheels can be taken off for a more thorough inspection.  
Braking assistance systems  
Please first read and note the introductory information and heed the WARNINGS  
The ESC, ABS, BAS, ASR, and EDL braking assistance systems work only when the engine is  
running. These systems can significantly improve active driving safety.  
Electronic Stability Control (ESC)  
ESC helps to improve road holding and vehicle dynamics to help reduce the probability of skidding  
and loss of vehicle control. It works only when the engine is running. ESC detects certain difficult  
driving situations, including when the vehicle is beginning to spin (yaw) out of control. ESC then helps  
you to get the vehicle back under control by selectively braking the wheels and/or reducing engine  
power and by providing steering assistance to help hold the vehicle on the driver's intended course.  
ESC has limitations. It is important to remember that ESC cannot overcome the laws of physics. It will  
not always be able to help out under all conditions you may come up against. For example, ESC may  
not always be able to help you master situations where there is a sudden change in the coefficient of  
friction of the road surface. When there is a section of dry road that is suddenly covered with water,  
slush or snow, ESC cannot perform the same way it would on a dry surface. If the vehicle  
“hydroplanes” (rides on a cushion of water instead of the road surface), ESC will not be able to help  
you steer the vehicle because contact with the pavement has been interrupted and the vehicle cannot  
be braked or steered. During fast cornering, particularly on winding roads, ESC cannot always deal as  
effectively with difficult driving situations as it can at lower speeds. When towing a trailer, ESC is not  
able to help you regain control as it would if you were not towing a trailer.  
Always adjust your speed and driving style to visibility, road, traffic, and weather conditions. ESC  
cannot override the vehicle's physical limits, increase the available traction, or keep a vehicle on the  
road if road departure is a result of driver inattention. Instead, ESC improves the possibility of keeping  
the vehicle under control and on the road during extreme maneuvers by using the driver's steering  
inputs to help keep the vehicle going in the intended direction. If you are traveling at a speed that  
causes you to run off the road before ESC can provide any assistance, you may not experience the  
benefits of ESC.  
ESC includes and/or works together with the ABS, BAS, ASR, EDL, and XDL systems (see below).  
ESC is switched on all the time and cannot be switched off.  
Anti-Lock Brake System (ABS)  
ABS helps to keep the wheels from locking up and helps to maintain the driver's ability to steer and  
control the vehicle. This means the vehicle is less likely to skid, even during hard braking:  
Push the brake pedal down hard and hold it there. Don't take your foot off the pedal or reduce the  
force on the pedal!  
Do not “pump” the brake pedal or let up on it!  
Steer the vehicle while pushing down hard on the brake pedal.  
ABS stops working if you release or let up on the brake.  
When ABS is doing its job, you will notice a slight vibration through the brake pedal and hear a  
noise. ABS cannot shorten the stopping distance under all conditions. The stopping distance may  
even be longer, for instance, when driving on gravel or on newly fallen snow covering an icy or  
slippery surface.  
Brake Assist (BAS)  
The Brake Assist System can help to reduce stopping distances. If you press the brake pedal very  
quickly, BAS detects an emergency situation. It then very quickly builds up full brake system pressure,  
maximizing braking power and reducing the stopping distance. This way, ABS can be activated more  
quickly and efficiently.  
Do not reduce pressure on the brake pedal! BAS switches off automatically as soon as you release or  
let up on the brake.  
Anti-Slip Regulation (ASR)  
ASR reduces engine power directed to spinning wheels and adjusts power to the road conditions.  
Even under poor road conditions, ASR can make it easier to get moving, accelerate, and climb hills.  
ESC and ASR can help when driving on loose surfaces (such as gravel) and in deep snow. If you get  
stuck in deep snow, you may be able to get going again by “rocking” the vehicle back and forth. ESC  
and ASR recognize this special driving situation and automatically increase the speed of the front  
wheels. Keep pressing the accelerator and let ESC increase the speed of the front wheels to help you  
keep moving or get moving again.  
Electronic Differential Lock (EDL and XDL)  
EDL is applied during regular straight-line acceleration. EDL gently brakes a drive wheel that has lost  
traction (spinning) and redirects the drive force to other drive wheels. In extreme cases, EDL  
automatically switches off to keep the brake from overheating. As soon as the brake has cooled down,  
EDL automatically switches on again.  
XDL is an extension of the Electronic Differential Lock system. XDL does not react to drive wheel  
slippage when driving straight ahead. Instead, XDL detects slippage of the inside front wheel during  
fast cornering. XDL applies enough brake pressure to this wheel in order to stop the slippage. This  
improves traction, which helps the vehicle stay on track.  
WARNING  
Driving fast on icy, slippery, or wet roads can lead to a loss of control and result in serious  
personal injury for you and your passengers.  
Always adjust your speed and driving style to road, traffic, weather, and visibility  
conditions. Never let the additional safety that ESC, ABS, BAS, ASR, and EDL can provide  
tempt you into taking extra risks.  
Braking assistance systems cannot overcome the laws of physics and always prevent  
loss of vehicle control. Slippery and wet roads are still dangerous even with ESC and the  
other systems!  
Driving too fast on wet roads can cause the wheels to lose contact with the road and  
“hydroplane.” A vehicle that has lost road contact cannot be braked, steered, or controlled.  
These systems cannot reduce the risk of accident, for example if you drive too fast for  
conditions or if you do not keep your distance from the vehicle in front of you.  
Although these systems are very effective and can help you control the vehicle in many  
difficult situations, always remember that your vehicle handling control is limited by tire  
traction.  
When accelerating on a slippery surface, for example on ice and snow, depress the  
accelerator carefully. Even with these systems, the wheels may start to spin, leading to a loss  
of vehicle control.  
WARNING  
The effectiveness of ESC can be significantly reduced if other components and systems that  
affect vehicle dynamics, including but not limited to brakes, tires, and other systems  
mentioned above, are not properly maintained or functioning.  
Always remember that vehicle alterations or modifications can affect the functioning of  
the ABS, BAS, ASR, EDL, and ESC systems.  
Changing the vehicle suspension or using an unapproved tire / wheel combination can  
change the way the ABS, BAS, ASR, EDL, and ESC systems work and reduce their  
effectiveness.  
The effectiveness of ESC is also determined by the tires fitted ⇒ꢀpage 156, Tires and  
wheels.  
All 4 wheels must be equipped with identical tires in order for ESC and ASR to work properly.  
Differences in the tread circumference of the tires can cause the system to reduce the engine power  
when it is not expected.  
If ABS is not working, ESC, ASR, and EDL will also not work.  
You may hear noises when these systems are active.