2004 Mercedes C-Class Owner's Manual - Page 330

Practical hints Towing the vehicle ! When towing the vehicle with all wheels on the ground, please note the following: With the automatic central locking activated and the SmartKey in starter switch position 2, the vehicle doors lock if the left front wheel as well as the right rear wheel are turning at vehicle speeds of approx. 9 mph (15 km/h) or more. Switch off the tow-away alarm ( page 79). To prevent the vehicle doors from locking, deactivate the automatic central locking ( page 133). Towing of the vehicle should only be done using the properly installed towing eye bolt. Never attach tow cable, tow rope or tow rod to vehicle chassis, frame or suspension parts. Warning! G i If the battery is disconnected or discharged the SmartKey will not turn in the starter switch. See notes on the battery ( page 323) or on jump starting ( page 326). the gear selector lever will remain locked in position P. See notes on manually unlocking transmission gear selector lever ( page 308). With the engine not running, there is no power assistance for the brake and steering systems. In this case, it is important to keep in mind that a considerably higher degree of effort is necessary to brake and steer the vehicle. Adapt your driving accordingly. 330