Mercedes-Benz E 350 BlueEFFICIENCY Cabriolet, Operator'S Manual

Page: 70 / 372

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 detects 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.
Above a speed of around 4 mph (7 km/h), this
function warns you if you are very quickly
approaching 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.
If the driver and front passenger have their
seat belt fastened, PRE-SAFE
®
Brake can also
brake the vehicle automatically at speeds
from approximately 4 mph (7 km/h) 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 prevent the intervention of the PRE-
SAFE
®
Brake 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 of up to 40 mph (70 km/h), PRE-
SAFE
®
Brake can also detect stationary
obstacles, for example, 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, preventive passenger protection
measures (PRE-SAFE
®
) are activated
(
Y
page 52). 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 the level of
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.
Automatic emergency braking cannot prevent
a collision. There is a risk of an accident.
Always apply the brakes yourself and try to
take evasive action.
G
WARNING
PRE-SAFE
®
Brake cannot always clearly
identify objects and complex traffic
conditions.
In these cases, PRE-SAFE
®
Brake may:
R
give an unnecessary warning and then
brake the vehicle
R
not give a warning or intervene
There is a risk of an accident.
68
Driving safety systems
Safety