2005 Mercedes SL-Class Owner's Manual - Page 406

Practical hints Batteries Unhook the luggage cover in the trunk. Remove the trunk floor. The battery for electrical consumers is located in the right hand area of the trunk ( page 372). Use the 10 mm open-end wrench from the vehicle tool kit to disconnect the negative lead from negative terminal 4 of the consumer battery. Open the hood ( page 270). 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. Remove the covers from the positive terminals 1 and 3. Disconnect the positive lead from positive terminal 3 of the consumer battery. Disconnect the positive lead from positive terminal 1 of the starter battery. Removing the consumer battery Remove the screws securing the battery in the trunk. Remove the battery support and bracket. Take out the battery. Warning! Removing the starter battery Remove the screws securing the starter battery in the engine compartment. Lift the retaining bracket. Remove the battery. Removing the batteries Charging and reinstalling batteries Charge batteries in accordance with the instructions of the battery charger manufacturer. Reinstall the charged batteries. Follow the previously described steps in reverse order. G Never charge a battery while still installed in the vehicle. Gases may escape during charging and cause explosions that may result in paint damage, corrosion or personal injury. 404