2006 Mercedes C-Class Owner's Manual - Page 414

Practical hints Battery Disconnecting the battery Turn off the engine ( page 59). With a disconnected battery you will no longer be able to turn the SmartKey in the starter switch the gear selector lever will remain locked in position P Warning! G Removing the battery Remove the screw-nuts securing the battery. Remove the battery bracket. Pull out the battery ventilation tube from the battery (depending on battery arrangement in your vehicle model, the ventilation tube is located either on the left or right side of the battery). Take out the battery. Turn off all electrical consumers. Remove SmartKey from starter switch. Open the hood ( page 297). Remove the filter box ( page 412). Disconnect the battery negative lead from negative terminal 1. Remove cover 2 from the positive terminal. Disconnect the battery positive lead. 1 Negative terminal 2 Positive terminal cover 413