Mercedes-Benz 2008 S550 Operator's Manual page 71

Safety and Security
Driving safety systems
When you step quickly on the brake pedal
in an emergency braking situation,
BAS Plus automatically regulates the
brake power boost to a level that is suit-
able for the traffic situation.
If BAS Plus requires a particularly high
brake power boost, PRE-SAFE
ed at the same time.
Keep constant pressure on the brake
pedal until the emergency braking situ-
ation is over.
During this process, ABS prevents the
wheels from locking up.
The brakes will resume normal operation
after
the brake pedal is released
no obstacles are detected in your path
the system no longer senses a risk of a
collision
BAS Plus is deactivated.
70
BAS Plus can react to stationary obstacles
such as standing or parked vehicles at
road speeds of up to approximately
40 mph (70 km/h).
BAS Plus can only assist you when the
radar sensors are switched on and func-
®
is activat- tional. You can check whether the sensors
are active by switching on DISTRONIC
Plus* ( page 424) or using the "Radar
sensor" menu ( page 282) in the instru-
ment cluster control system.
Warning!
BAS Plus will only respond with brake assis-
tance if it has clearly detected an object. De-
tection can be impeded by
dirty or covered sensors
snowfall or heavy rain
disturbance from other radar sources
strong radar reflection such as in park-
ing garages
BAS Plus uses radar signals that are not re-
flected well by narrow objects and absorp-
tive materials. For this reason BAS Plus will
not react to
persons and animals
approaching traffic or cross-traffic
BAS Plus may not detect narrow vehicles
driving in front of you, such as motorcycles
and vehicles driving offset from your vehicle
center.
G
After a hard collision or damage to the
front of the vehicle from an accident, have
the adjustment and operation of the radar
sensors checked by an authorized
Mercedes-Benz Center.
If BAS Plus is not available due to a radar
sensor malfunction, the braking system
will continue to function normally with full
brake boost and full standard BAS
function.