2008 Mercedes SL-Class Owner's Manual - Page 431

Practical hints Batteries Open the hood ( page 282). Use the 10 mm open-end wrench from the vehicle tool kit to disconnect the negative lead from negative terminal 2 of the starter battery ( page 427). Remove the covers from the positive terminals 1 and 4 ( page 427). Disconnect the positive lead from positive terminal 4 of the consumer battery ( page 427). Disconnect the positive lead from positive terminal 1 of the starter battery ( page 427). Removing the batteries Removing the consumer battery Remove the screws securing the battery in the trunk. Remove the battery support and bracket. Pull out the battery ventilation hose 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. Removing the starter battery Remove the screws securing the starter battery in the engine compartment. Pull battery ventilation 3 ( page 427) out of the battery. Lift the retaining bracket. Remove the battery. Charging and reinstalling batteries Warning! G Never charge a battery while still installed in the vehicle unless the accessory battery charge unit approved by Mercedes-Benz is being used. Gases may escape during charging and cause explosions that may result in paint damage, corrosion or personal injury. An accessory battery charge unit specially adapted for Mercedes-Benz vehicles and tested and approved by Mercedes-Benz is available, permitting the charging of the battery in its installed position. Contact an authorized Mercedes-Benz Center for information and availability. Charge battery in accordance with the separate instructions for the accessory battery charger. 430