2011 Mercedes SL-Class Owner's Manual - Page 65

Anti-theft systems out by qualified technicians only. Contact an authorized Mercedes-Benz Center for further information. The electro-hydraulic brake system must be deactivated prior to working on the system. High pressure is intermittently built up in the system as part of its automatic self-test. In addition, the system is automatically activated when the vehicle is unlocked by remote control, when the driver or passenger door is opened, when the SmartKey in the starter switch is turned to position 1 or the KEYLESS-GO start/stop button is pressed once, when the brake pedal is depressed or when the parking brake is released. Failure to deactivate the system prior to maintenance will cause brake pistons to extend and brake fluid to leak, which may result in injuries (contusions and acid burns). Extended brake pistons may also cause injury. 63 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. X With SmartKey: Remove the SmartKey from the starter switch. X With KEYLESS-GO: Turn off the engine and open the driver's door. Deactivating X Switch on the ignition. The electro-hydraulic brake system switches off automatically Rapproximately 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). Anti-theft alarm system Once the alarm system has been armed, a visual and audible alarm is triggered when someone opens 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 door trunk hood glove box Rthe Rthe Ra 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 210). storage compartment in the rear Rthe Rthe storage compartment under the armrest Anti-theft systems Immobilizer The immobilizer prevents unauthorized persons from starting your vehicle. The alarm will stay on even if the activating element, a door, for example, is closed immediately. The alarm system will also be triggered when Rthe Rthe vehicle is raised (tow-away alarm) vehicle is opened with the mechanical key Z Safety and security Activating