2007 Mercedes S-Class Owner's Manual - Page 639

Practical hints Batteries ! Only use charging devices with a maximum charging voltage of 14.8 V. Starter battery Warning! Reinstalling starter battery Install starter battery in engine compartment. Make sure that the consumer battery in the trunk is correctly installed and connected. Turn SmartKey in starter switch to position 0 and remove. Connect the positive lead and fasten its cover 2 ( page 636). Connect negative lead 1 ( page 636). Attach ventilation tube. G Swing retaining bar down. During the charge procedure, there is a risk of acid burns due to gases escaping from the battery. Do not bend over the battery during the charge procedure. ! The battery and the battery ventilation hose must always be securely installed when the vehicle is in operation. Reconnecting starter battery ! Always connect the starter battery in the orConnect the switched-off charging device to the terminals of the starter battery. Observe the operating instructions in the manual for the charging device while doing so. der described below. Otherwise, the vehicle's electronics could be damaged. ! Never invert the terminal connections. ! Make sure that the battery has a plug where the ventilation tube is attached to it. Warning! G Switch on the ignition ( page 315). Start the engine ( page 359). Check vehicle functions. Do not drive without a properly installed and connected consumer battery. Have any work on the consumer battery carried out by an authorized Mercedes-Benz Center. 638