2011 Mercedes S-Class Owner's Manual - Page 75

Anti-theft systems In order to maintain an appropriate distance from the vehicle in front and thus prevent a collision, you must apply the brakes yourself. At speeds up to approximately 40 mph (70 km/h), PRE-SAFE® Brake may also detect stationary obstacles, for example stopped or parked vehicles. Following a collision or collision-related damage to the front end of the vehicle, have the configuration and operation of the radar sensors checked. Choose a qualified specialist workshop which has the necessary specialist knowledge and tools for the work required. Mercedes-Benz recommends that you use an authorized Mercedes-Benz Center for this purpose. 73 G Warning! If you do not receive visual or acoustic warning signals, the PRE-SAFE® Brake may Rnot have recognized the collision risk Rhave been deactivated Rbe malfunctioning Apply the brakes yourself to avoid a collision. X Anti-theft systems Immobilizer The immobilizer prevents your vehicle from being started without the correct key. When leaving the vehicle, always take the SmartKey with you and lock the vehicle. The engine can be started by anyone with a valid key that is left inside the vehicle. 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. To activate/deactivate: activate or deactivate PRE-SAFE® Brake in the onboard computer (Y page 376). After activation, the Ä symbol is displayed on the left in the instrument cluster. For PRE-SAFE® Brake to assist you when driving, the radar sensor system must be switched on and operational. PRE-SAFE® Brake does not always detect complex traffic situations properly. You can terminate the braking action of PRE-SAFE® Brake in a non-critical driving situation at any time if: Ran i The immobilizer is always deactivated when you start the engine. ATA (Anti-Theft Alarm system) A visual and audible alarm is triggered if the alarm system is armed and you open: Ra acoustic and visual warning occurs. vehicle brakes. To stop the braking action, you can either depress the accelerator pedal further, activate kickdown or release the brake pedal. The braking action of PRE-SAFE® Brake is ended automatically if: Rthe Ryou maneuver to avoid the obstacle. speed drops below approximately 9 mph (15 km/h). Rthere is no longer an obstacle detected in front of your vehicle. Rthere is no longer any danger of a collision. Ryour door vehicle with the mechanical key Rthe trunk lid Rthe hood The alarm is not switched off, even if you close the open door that has triggered it, for example. Rthe Z Safety