2008 Mercedes S-Class Owner's Manual - Page 339

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 1. All turn signal lamps flash once. An acoustic signal sounds once (if equipped and feature activated). 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 a door nor the trunk is opened the central locking/unlocking switch is not activated i Your vehicle may be equipped with an acoustic lock and unlock confirmation signal feature. If your vehicle is equipped with this feature and the feature is activated, an acoustic signal will sound when the vehicle is locked or unlocked using the SmartKey with KEYLESS-GO. To determine whether or not your vehicle is equipped with this feature, contact an authorized Mercedes-Benz Center. If equipped and you wish to activate or deactivate the feature, or adjust its signal volume, also contact an authorized Mercedes-Benz Center. i The vehicle could inadvertently be unlocked if the SmartKey with KEYLESS-GO is within 3 ft (1 m) of the vehicle and: 1 Outside door handle an outside door handle is splashed with water, or you attempt to clean an outside door handle. 338