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Intelligent technology 181
Safety First Controls and equipment Practical tips Technical Data
Practical tips
Intelligent technology
Brakes
Brake servo
The brake servo amplifies the pressure you apply to the brake pedal. It works
only when the engine is running.
If the brake servo is not functioning due to a malfunction, or if the vehicle has
to be towed, you will have to press the brake pedal considerably harder to
make up for the lack of servo assistance.
WARNING
The braking distance can also be affected by external factors.
•
Never let the vehicle coast with the engine switched off. Failure to do so
could result in an accident. The braking distance is increased considerably
when the brake servo is not active.
• If the brake servo is not working, for example when the vehicle is being
towed, you will have to press the brake pedal considerably harder than
normal.
Brake assist system (BAS)*
The Brake Assist System (BAS) function is only included in
vehicles with ESP.
In an emergency, most drivers brake in time, but not with maximum force.
This results in unnecessarily long braking distances.
The brake assist system intervenes when you press the brake pedal very
quickly because the brake assist system registers an emergency situation. It
then very quickly builds up the full brake pressure so that the ABS can be acti-
vated more quickly and efficiently, thus reducing the braking distance.
Do not reduce the pressure on the brake pedal. The brake assist system
switches off automatically as soon as you release the brake.
Emergency braking function
When the vehicle detects sudden braking, the hazard warning lights auto-
matically come on to warn vehicles behind. The hazard warning lights go off
when the vehicle accelerates or the hazard warning light switch is pressed.
WARNING
• The risk of accident is higher if you drive too fast, if you do not keep
your distance to the vehicle in front, and when the road surface is slippery
or wet. The increased accident risk cannot be reduced by the brake assist
system.
• The brake assist system cannot defy the laws of physics. Slippery and
wet roads are dangerous even with the brake assist system! Therefore, it is
Leon_EN.book Seite 181 Dienstag, 8. September 2009 5:25 17
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