Mercedes-Benz CLS-Class 2014 Owners Manual - Manual (Page 75)

In order to maintain the appropriate distance
to the vehicle in front and thus prevent a
collision, you must apply the brakes yourself.
Due to the nature of the system, particularly
complicated driving conditions may cause
unnecessary warnings or the unnecessary
intervention of PRE-SAFE ® Brake.
Following damage to the front end of the
vehicle, have the configuration and operation
of the radar sensors checked at a qualified
specialist workshop. This also applies to
collisions at low speeds where there is no
visible damage to the front of the vehicle.
Function
X
To activate/deactivate: activate or
deactivate PRE-SAFE ® Brake in the on-
board computer (
Y
page 228).
If the PRE-SAFE ® Brake is not activated, the
æ symbol appears in the multifunction
display.
If you approach a vehicle in front very quickly,
this function warns you from a speed of
approximately 4 mph (7 km/h). An
intermittent warning tone sounds and the
· distance warning signal lamp in the
instrument cluster lights up.
X Brake immediately to defuse the situation.
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 front passenger
have fastened their seat belts, PRE-SAFE ®
Brake can brake the vehicle automatically at
speeds up to approximately 124 mph
(200 km/h).
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.
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 54). If a risk of collision
remains at speeds of over 20 mph
(30 km/h) and you do not brake, take evasive
action or significantly accelerate, automatic
braking may be performed up to and including
emergency braking. Automatic emergency
braking is not performed until immediately
prior to an accident that can no longer be
avoided.
Theft deterrent locking system
Immobilizer
The immobilizer prevents your vehicle from
being started without the correct SmartKey.
X
To activate with the SmartKey: remove
the SmartKey from the ignition lock.
X To activate with KEYLESS-GO: switch the
ignition off and open the driver's door.
X To deactivate: switch on the ignition.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle.
Anyone can start the engine if a valid
SmartKey has been left inside the vehicle.
i The immobilizer is always deactivated
when you start the engine.
In the event that the engine cannot be
started when the starter battery is fully
charged, the immobilizer may be faulty.
Theft deterrent locking system
73
Safet
y
Z