2009 Mercedes SL-Class Owner's Manual - Page 73

Safety and security Anti-theft systems The electro-hydraulic brake system switches off automatically Rapproximately Anti-theft systems Immobilizer The immobilizer prevents unauthorized persons from starting your vehicle. When leaving the vehicle, always take the SmartKey with you and lock the vehicle. The engine can be started by anyone with a valid SmartKey that is left inside the vehicle. Anti-theft alarm system Once the alarm system has been armed, a visual and audible alarm is triggered when someone opens: Ra door Rthe Rthe Ra 2 minutes after you turned the SmartKey in the starter switch to position 0 or removed the SmartKey the KEYLESS-GO start/stop button to turn off the engine or power supply and opened the driver's door (with driver's door open, the starter switch is set to position 0, same as SmartKey removed from starter switch) Rapproximately 2 minutes after you pressed trunk hood glove box storage compartment in the rear Activating X X Rthe Rthe Rapproximately 20 seconds after you locked the vehicle from outside For more information on your vehicle's brakes, see the "Driving instructions" section (Y page 237). With the SmartKey: Remove the SmartKey from the starter switch. With KEYLESS-GO: Turn off the engine and open the driver's door. storage compartment under the armrest Deactivating X The alarm will stay on even if the activating element (a door, for example) is immediately closed. The alarm system will also be triggered when Rthe vehicle is raised Rthe Switch on the ignition. vehicle is opened with the mechanical i Starting the engine will also deactivate the immobilizer. In the event that the engine cannot be started (yet the vehicle's battery is charged), the system is not operational. Contact an authorized Mercedes-Benz Center or call 1-800-FOR-MERCedes (in the USA), or 1-800-387-0100 (in Canada). key Ra door is opened from the inside Rthe trunk is opened with the emergency release button To cancel the alarm after it has been triggered, see "Canceling the alarm" (Y page 73). Z 71