2007 Mercedes S-Class Owner's Manual - Page 310

Controls in detail Locking and unlocking 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 still in vehicle" appears 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. i If the vehicle has been parked for more than 72 hours, you must pull an outside door handle in order to activate the KEYLESS-GO function. 1 Outside door handle Global locking: close all doors and touch outside of door handle 1. Do not keep your hand in the door handle recess. With the trunk and all doors closed, all turn signal lamps flash three times. The locking knobs in the doors move down. The anti-theft alarm system is armed. The vehicle will lock again automatically and reactivate the anti-theft alarm system within approximately 40 seconds of unlocking if: neither a door nor the trunk is opened the central locking switch is not activated i The vehicle could inadvertently be 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. 309