2008 Mercedes C-Class Owner's Manual - Page 81

Controls in detail Locking and unlocking Front doors Pull on door handle 2 on the respective front door to open door. If door was locked, locking knob 1 will move up. Rear doors Pull up locking knob 1 on the respective rear door to unlock door. Pull on door handle 2 on the respective rear door to open door. Automatic central locking The doors and the trunk automatically lock when the ignition is switched on and the wheels are turning at vehicle speeds of approximately 9 mph (15 km/h) or more. The locking knobs in the doors move down. You can open a locked door from the inside. Open door only when conditions are safe to do so. You could therefore lock yourself out when the vehicle is pushed or towed, or it is on a test stand. 1 Central unlocking switch 2 Central locking switch Activating: Press and hold central locking switch 2 until you hear a chime. Deactivating: Press and hold central unlocking switch 1 until you hear a chime. Automatic central locking activating/deactivating You can deactivate the automatic locking using the control system ( page 173). 80