2008 Mercedes R-Class Owner's Manual - Page 117

Controls in detail Locking and unlocking If the SmartKey with KEYLESS-GO is removed from the vehicle (e.g. if a passenger exits the vehicle with the SmartKey with KEYLESS-GO) when pressing the KEYLESS-GO start/stop button or trying to lock the vehicle with the lock button on an outside door handle, the message Key Not Detected appears in the multifunction display with the engine running, the message Key Not Detected appears in the multifunction display while driving off Find the SmartKey with KEYLESS-GO or change its present location immediately (e.g. place it on the front passenger seat or insert it in shirt pocket). Remember that the engine can be started by anyone with a SmartKey with KEYLESS-GO that is left inside the vehicle. Possibility 1: (One SmartKey with KEYLESS-GO in the vehicle, one SmartKey with KEYLESS-GO outside the vehicle): If you leave the SmartKey with KEYLESS-GO behind when exiting and locking the vehicle, no message appears in the multifunction display. Possibility 2: (One SmartKey with KEYLESS-GO in the vehicle, no SmartKey with KEYLESS-GO outside the vehicle): When exiting and trying to lock the vehicle, the message Key Detected In Vehicle will appear in the multifunction display. The vehicle will not be locked. Factory setting Global unlocking Grasp an outside door handle. All turn signal lamps flash once. The locking knobs in the doors move up. The anti-theft alarm system is disarmed. The vehicle will lock again automatically and rearm the anti-theft alarm system within approximately 40 seconds of unlocking if neither door nor tailgate is opened the central locking switch is not activated i The vehicle could be inadvertently unlocked if the SmartKey with KEYLESS-GO is within 3 ft (1 m) of the vehicle and an outside door handle is splashed with water or you attempt to clean an outside door handle 116