Mercedes-Benz 2015 M-Class Operator's Manual page 78

Driving safety systems
76
WARNING
G
®
PRE-SAFE Brake does not react:
to people or animals
R
to oncoming vehicles
R
to crossing traffic
R
when cornering
R
As a result, PRE-SAFE
give warnings nor intervene in all critical sit-
uations. There is a risk of an accident.
Always pay careful attention to the traffic sit-
uation and be ready to brake.
In the event of snowfall or heavy rain, the rec-
ognition can be impaired.
Recognition by the radar sensor system is
also impaired in the event of:
dirt on the sensors or anything else cover-
R
ing the sensors
interference by other radar sources
R
strong radar reflections, for example in
R
parking garages
a narrow vehicle traveling in front, e.g. a
R
motorbike
a vehicle traveling in front on a different line
R
relative to the center of your vehicle
Following damage to the front end of the vehi-
cle, have the configuration and operation of
the radar sensors checked at a qualified spe-
cialist workshop. This also applies to colli-
sions at low speeds where there is no visible
damage to the front of the vehicle.
Function
To activate/deactivate: activate or deac-
X
tivate PRE-SAFE
computer ( page 276).
Y
If the PRE-SAFE
æ symbol appears in the multifunction
display.
Starting at a speed of around 4 mph (7 km/h),
this function warns you if you rapidly
approach a vehicle in front. An intermittent
warning tone will then sound and the ·
®
Brake may neither
®
Brake in the on-board
®
Brake is not activated, the
distance warning lamp will light up in the
instrument cluster.
Brake immediately to defuse the situation.
X
or
Take evasive action provided it is safe to do
X
so.
®
PRE-SAFE Brake can also brake the vehicle
automatically under the following conditions:
the driver and front-passenger have their
R
seat belts fastened
and
the vehicle speed is between approx-
R
imately 4 mph (7 km/h) and 124 mph
(200 km/h)
At speeds of up to approximately 40 mph
(70 km/h) PRE-SAFE
stationary objects. Examples of stationary
objects are stopped or parked vehicles.
i
If there is an increased risk of collision,
preventive passenger protection measures
®
(PRE-SAFE ) are activated.
If the risk of collision with the vehicle in front
remains and you do not brake, take evasive
action or accelerate significantly, the vehicle
may perform automatic emergency braking,
up to the point of full brake application. Auto-
matic emergency braking is not performed
until immediately prior to an imminent acci-
dent.
You can prevent the intervention of the PRE-
®
SAFE Brake at any time by:
depressing the accelerator pedal further.
R
activating kickdown.
R
releasing the brake pedal.
R
The braking action of PRE-SAFE
ended automatically if:
you maneuver to avoid the obstacle.
R
there is no longer any danger of a collision.
R
there is no longer an obstacle detected in
R
front of your vehicle.
If you have activated DSR (
®
SAFE Brake is deactivated.
®
Brake can also detect
®
Brake is
page 250), PRE-
Y