2003 Mercedes S-Class Owner's Manual - Page 82

Safety and Security Anti-theft systems Anti-theft systems Immobilizer The immobilizer prevents unauthorized persons from starting your vehicle. Activating With the SmartKey: Removing the SmartKey from the starter switch activates the immobilizer. With KEYLESS-GO*: Turning off the engine by means of the KEYLESS-GO start/stop button on the gear selector lever activates the immobilizer. Deactivating With the SmartKey: Inserting the SmartKey in the starter switch deactivates the immobilizer. With KEYLESS-GO*: Starting the engine by means of the KEYLESS-GO start/stop button on the gear selector lever deactivates the immobilizer. Anti-theft alarm system Once the alarm system has been armed, a visual and audible alarm is triggered when someone opens a door the trunk the hood 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 someone attempts to raise the vehicle the vehicle is opened with the mechanical key i In case 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). 82