2005 Mercedes C-Class Owner's Manual - Page 91

Controls in detail Locking and unlocking Factory setting Global unlocking When leaving the vehicle, always remove the SmartKey from the starter switch and lock the vehicle. Do not leave children unattended in the vehicle, or with access to an unlocked vehicle. It is possible for children to open a locked door from the inside, which could result in an accident and/or serious injury. Warning! G Global locking Press button ‹. All turn signal lamps flash three times. The locking knobs in the doors move down. The anti-theft alarm system* is activated. Selective setting If you frequently travel alone, you may wish to reprogram the SmartKey so that pressing Œ only unlocks the driver's door and the fuel filler flap. Press and hold buttons Œ and ‹ simultaneously for about five seconds until battery check lamp 5 flashes twice. Press button Œ. All turn signal lamps flash once. The locking knobs in the doors move up. The anti-theft alarm system* is switched off. The vehicle will lock again automatically and reactivate the anti-theft alarm system* within approximately 40 seconds of unlocking if: neither door nor trunk is opened the SmartKey is not inserted in the starter switch the central locking switch is not activated ! To prevent possible malfunction, avoid exposing the SmartKey to high levels of electromagnetic radiation. i You can also open and close the power windows ( page 225) and power tilt/sliding sunroof* ( page 229) from outside using the SmartKey. 89