2009 Mercedes R-Class Owner's Manual - Page 82

Safety and security Anti-theft systems The ESP® trailer stabilization is functional at vehicle speeds above approximately 40 mph (65 km/h) when the ESP® is switched on. 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 G Warning! The system will not be able to assist when the trailer jackknifes Rif the ESP® has switched off due to a malfunction wet or icy roads roads with slippery surface tailgate hood Ron Ron Rin Activating X X sand or gravel Trailers with a high center of gravity may tip over before the system recognizes swaying of the trailer. With SmartKey: Remove the SmartKey from the starter switch. With KEYLESS-GO: Turn off the engine and open the driver's door. 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 opened with the mechanical key Ra door is opened from the inside Deactivating X Switch on the ignition. To cancel the alarm after it has been triggered, see "Canceling the alarm" (Y page 81). 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). i If the alarm stays on for more than 30 seconds, a call to the Response Center is initiated automatically by the Tele Aid system provided that you have subscribed to the Tele Aid service and that it has been activated properly, and that the necessary mobile phone, power supply and GPS coverage are available. 80