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Driving safety systems
64
ABS
G
Observe Safety notes, see
page 63.
G
Warning!
Do not pump the brake pedal. Use firm,
steady brake pedal pressure instead.
Pumping the brake pedal defeats the pur-
pose of the ABS and significantly reduces
braking effectiveness.
The Antilock Brake System (ABS) regulates
the brake pressure so that the wheels do not
lock during braking. This allows you to main-
tain the ability to steer your vehicle.
The ABS is functional above a speed of
approximately 5 mph (8 km/h) independent
of road surface conditions.
On slippery road surfaces, the ABS will
respond even to light brake pressure.
The - indicator lamp in the instrument
cluster comes on when you switch on the
ignition. It goes out when the engine is run-
ning.
Braking
If the ABS activates during braking, the ABS/
ESP
®
warning lamp v in the instrument
cluster flashes. Because of the electro-
hydraulic brake system, you will not feel any
pulsation in the brake pedal.
X
Keep firm and steady pressure on the brake
pedal.
Continuous, steady brake pedal pressure
yields the advantages provided by the ABS,
namely braking power and the ability to steer
the vehicle.
The ABS/ESP
®
warning lamp v flashes
whenever the ABS is activated. It can be an
indication for hazardous road conditions and
functions as a reminder to take extra care
while driving.
Emergency brake maneuver
X
Keep continuous full pressure on the brake
pedal.
G
Warning!
If the ABS malfunctions, other driving
safety systems such as the BAS or the
ESP
®
are also switched off. Observe indi-
cator and warning lamps that may come on
as well as messages in the multifunction
display that may appear.
If the ABS malfunctions, the wheels may
lock during hard braking, reducing steering
capability and extending the braking dis-
tance.
For more information, see “What to do
if …?” (Y page 293).
BAS
G
Observe Safety notes, see
page 63.
The Brake Assist System (BAS) operates in
emergency situations. If you apply the brakes
very quickly, the BAS automatically provides
full brake boost, thereby potentially reducing
the braking distance.
X
Apply continuous full braking pressure until
the emergency braking situation is over.
The ABS will prevent the wheels from lock-
ing.
When you release the brake pedal, the brakes
function again as normal. The BAS is then
deactivated.
G
Warning!
If the BAS malfunctions, the brake system
still functions, but without the additional
brake boost available that the BAS would
normally provide in an emergency braking
Safety and security