Mercedes-Benz GLK 300 4MATIC 2012 Owner's Manual page 69

Driving safety systems
66
If ABS intervenes when braking, you will feel
a pulsing in the brake pedal.
The pulsating brake pedal can be an indica-
tion of hazardous road conditions, and func-
tions as a reminder to take extra care while
driving.
Off-road ABS (vehicles with the Off-
Road Engineering package)
An ABS system specifically suited to off-road
terrain is activated automatically once the off-
road drive program (
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 when driving off-road. This
limits steering capability.
BAS (Brake Assist System)
i
Observe the "Important safety notes" sec-
tion ( page 65).
Y
G
WARNING
If BAS is malfunctioning, the braking distance
in an emergency braking situation is
increased. There is a risk of accident.
In an emergency braking situation, depress
the brake pedal with full force. ABS prevents
the wheels from locking.
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.
Keep the brake pedal depressed firmly until
X
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.
BAS PLUS (Brake Assist System Plus)
i
Observe the "Important safety notes" sec-
tion ( page 65).
Y
page 215) is activated.
Y
BAS PLUS is only available on vehicles with
DISTRONIC PLUS.
BAS PLUS provides braking assistance in haz-
ardous situations at speeds greater than
7 km/h and uses radar sensor technology to
assess 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.
To prevent a front-end collision, BAS PLUS
calculates the brake force necessary if:
you approach an obstacle, and
R
BAS PLUS has detected a risk of collision
R
When driving at a speed over 30 km/h: if
you depress the brake sharply, BAS PLUS
automatically increases the brake pressure to
a degree suited to the traffic situation.
When driving at a speed under 30 km/h:
if you depress the brake, BAS PLUS is activa-
ted. Braking will be carried out at the last
possible moment.
If BAS PLUS demands particularly high brak-
ing force, preventative passenger protection
measures (PRE-SAFE
taneously.
Keep the brake pedal depressed until the
X
emergency braking situation is over.
ABS prevents the wheels from locking.
BAS PLUS is deactivated and the brakes func-
tion as usual if:
you release the brake pedal
R
there is no longer any danger of a rear-end
R
collision
no obstacle is detected in front of your
R
vehicle
Vehicles with COMAND and a navigation sys-
tem: the radar sensor system is switched off
automatically in the vicinity of radio telescope
facilities ( page 375).
Y
®
) are activated simul-