Off-road ABS
An ABS system specifically suited to off-road
terrain is activated automatically once the off-
road program (
Y
page 222) is activated.
At speeds below 30 km/h, the front wheels
lock cyclically during braking. The digging-in
effect achieved in the process reduces the
stopping distance on off-road terrain. This
limits steering capability.
BAS (Brake Assist)
i
Observe the "Important safety notes" sec-
tion (
Y
page 61).
BAS operates in emergency braking situa-
tions. If you depress the brake pedal quickly,
BAS automatically boosts the braking force,
thus shortening the stopping distance.
X
Keep the brake pedal firmly depressed until
the emergency braking situation is over.
ABS prevents the wheels from locking.
The brakes will function as usual once you
release the brake pedal. BAS is deactivated.
G
WARNING
If BAS has malfunctioned, the braking system
remains available with full brake boosting
effect. However, braking force is not auto-
matically increased in emergency braking sit-
uations and the stopping distance may
increase.
BAS PLUS (Brake Assist System Plus)
BAS PLUS is only available on vehicles with
DISTRONIC PLUS.
i
Observe the "Important safety notes" sec-
tion (
Y
page 61).
BAS PLUS assists you in braking during haz-
ardous situations at speeds above 30 km/h
and uses the radar sensor system to evaluate
the traffic situation.
With the help of the radar sensor system, BAS
PLUS can detect obstacles that are in the
path of your vehicle for an extended period of
time.
At speeds up to approximately 70 km/h, BAS
PLUS may also detect stationary obstacles,
for example, stopped or parked vehicles.
Should you approach an obstacle and BAS
PLUS has detected a risk of collision, BAS
PLUS calculates the braking force necessary
to avoid a rear-end collision. Should you apply
the brakes forcefully, BAS PLUS can auto-
matically increase the braking force to a level
suitable for the traffic conditions.
If BAS PLUS demands particularly high brak-
ing force, preventative passenger protection
measures (PRE-SAFE
®
) are activated simul-
taneously.
X
Keep the brake pedal depressed until the
emergency braking situation is over.
ABS prevents the wheels from locking.
The brakes will work normally again if:
R
you release the brake pedal.
R
there is no longer any danger of a rear-end
collision.
R
no obstacle is detected in front of your
vehicle.
BAS PLUS is then deactivated. If you have
activated DSR (
Y
page 220), BAS PLUS is
likewise deactivated.
The radar sensor system is switched off auto-
matically in the vicinity of radio telescope
facilities in the following vehicles:
R
vehicles with COMAND Online and naviga-
tion
R
vehicles with Audio 20 and Becker
®
MAP
PILOT
Becker
®
MAP PILOT must be connected;
see the separate Audio 20 operating
instructions.
62
Driving safety systems
Safety
