158 Driving and operating
Brakes
The brake system consists of two in‐
dependent brake circuits.
If a brake circuit fails, the vehicle can
still be braked using the other brake
circuit. However, braking effect is
achieved only when the brake pedal
is depressed firmly. Considerably
more force is needed for this. The
braking distance is extended. Seek
the assistance of a repair shop before
continuing travel.
When the engine is not running, as‐
sistance from the brake servo unit dis‐
appears once the brake pedal has
been depressed once or twice. Brak‐
ing effect is not reduced, but braking
requires significantly greater force. It
is especially important to keep this in
mind when being towed.
Control indicator R 3 104.
Antilock Brake System
(ABS)
Antilock brake system (ABS) pre‐
vents the wheels from locking.
ABS starts to regulate brake pressure
as soon as a wheel shows a tendency
to lock. The vehicle remains steer‐
able, even during hard braking.
ABS control is made apparent
through a pulse in the brake pedal
and the noise of the regulation pro‐
cess.
For optimum braking, keep the brake
pedal fully depressed throughout the
braking process, despite the fact that
the pedal is pulsating. Do not reduce
the pressure on the pedal.
Control indicator u 3 105.
Adaptive brake light and hazard
warning flashers
During full ABS braking, all three
brake lights flash for the duration of
ABS control.
Fault
9 Warning
If there is a fault in ABS, the
wheels may be liable to lock due
to braking that is heavier than nor‐
mal. The benefits of ABS are no
longer available. During hard brak‐
ing, the vehicle can no longer be
steered and may swerve.
Have the cause of the fault remedied
by a workshop.
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