2009 Mercedes SL-Class Owner's Manual - Page 75
2009 Mercedes SL-Class Manual
Page 75 highlights
Safety and security Anti-theft systems Disabling tow-away alarm To prevent triggering the tow-away alarm, disable the tow-away alarm feature before towing the vehicle, or when parking on a surface subject to movement, such as a ferry or auto train. X X Press switch 1. Indicator lamp 2 comes on briefly. Exit and lock the vehicle. The tow-away alarm remains disabled until you lock the vehicle again. Canceling the alarm To cancel the alarm, do one of the following: X Insert the SmartKey in the starter switch. X Press the k or j button on the SmartKey. Grasp an outside door handle. The SmartKey must be within 3 ft (1 m) of the vehicle. Press the KEYLESS-GO start/stop button. The SmartKey must be inside the vehicle. In vehicles with KEYLESS-GO: X 1 Tow-away alarm off switch 2 Indicator lamp X X Switch off the ignition. Remove the SmartKey from the starter switch. X i You cannot disable the tow-away alarm feature with the ignition switched on. Z 73