Mercedes-Benz SL 550 BlueEFFICIENCY, Operator'S Manual

Page: 65 / 572

ADAPTIVE BRAKE
ADAPTIVE BRAKE enhances braking safety
and offers increased braking comfort. In
addition to the braking function, ADAPTIVE
BRAKE also has the HOLD function
(
Y
page 176) and hill start assist
(
Y
page 138).
PRE-SAFE
®
Brake
PRE-SAFE
®
Brake is only available in vehicles
with DISTRONIC PLUS.
PRE-SAFE
®
Brake can help you to minimize
the risk of a collision with a vehicle ahead or
reduce the effects of such a collision. If PRE-
SAFE
®
Brake has detected a risk of collision,
you will be warned visually and acoustically
as well as by automatic braking. PRE-SAFE
®
Brake cannot prevent a collision without your
intervention.
Starting at a speed of around
4 mph (7 km/h), this function warns you if
you very quickly approach a vehicle in front.
An intermittent warning tone will then sound
and the
·
distance warning lamp will light
up in the instrument cluster.
X
Brake immediately in order to increase the
distance from the vehicle in front.
or
X
Take evasive action provided it is safe to do
so.
From a speed of approximately
4 mph (7 km/h), if the driver and passengers
have fastened their seat belts, PRE-SAFE
®
Brake can brake the vehicle automatically at
speeds up to approximately
124 mph (200 km/h).
Due to the nature of the system, particularly
complicated driving conditions may cause
unnecessary warnings or the unnecessary
intervention of PRE-SAFE
®
Brake.
You can end PRE-SAFE
®
Brake intervention in
a non-critical driving situation at any time by:
R
depressing the accelerator pedal further
R
activating kickdown
R
releasing the brake pedal.
The braking action of PRE-SAFE
®
Brake is
ended automatically if:
R
you maneuver to avoid the obstacle.
R
there is no longer any danger of a rear-end
collision.
R
there is no longer an obstacle detected in
front of your vehicle.
With the help of the radar sensor system,
PRE-SAFE
®
Brake can detect obstacles that
are in front of your vehicle for an extended
period of time.
At speeds up to approximately
40 mph (70 km/h), PRE-SAFE
®
Brake can
also detect stationary obstacles such as
stopped or parked vehicles.
If you approach an obstacle and PRE-SAFE
®
Brake detects a risk of a collision, the system
will alert you both visually and acoustically. If
you do not brake or take evasive action, the
system will warn you by automatically braking
the vehicle gently. If there is an increased risk
of collision, preventative passenger
protection measures (PRE-SAFE
®
) are
activated (
Y
page 48).
If, at speeds over 20 mph (30 km/h), a risk
of collision remains and you do not brake,
take evasive action or significantly
accelerate, automatic braking may be
performed up to a level of automatic
emergency braking. Automatic emergency
braking is not performed until immediately
prior to an accident that can no longer be
avoided.
G
WARNING
PRE-SAFE
®
Brake will initially brake your
vehicle by a partial application of the brakes
if a danger of collision is detected. There may
be a collision unless you also brake.
Driving safety systems
63
Safety
Z