2003 Mercedes E-Class Owner's Manual - Page 344

Practical hints Batteries ! Never loosen or detach battery terminal clamps while the engine is running or the key is in the starter switch. Otherwise the alternator and other electronic components could be severely damaged. Have the battery checked regularly by an authorized Mercedes-Benz Center. Contact your authorized Mercedes-Benz Center for further information. Remove cover 2 from the positive terminal. Disconnect the battery positive lead. Removing the battery Remove the screw-nuts securing the battery. Remove the battery bracket. Take out the battery. Charging and reinstalling the battery Charge battery in accordance with the instructions of the battery charger manufacturer. Reinstall the charged battery. Follow the previously described steps in reverse order. Warning! With a disconnected battery G the brake boosting effect is not available. You need more power to brake and brake pedal travel is increased. If necessary, you must depress the brake pedal with full power. you can no longer turn the ignition key or, in cars with KEYLESS-GO*, pressing the KEY-LESS-GO button* on the gear selector lever has no effect. the gear selector lever is locked in position P. Warning! G Do not place metal objects on the battery as this could result in a short circuit. Use leak-proof battery only to avoid the risk of acid burns in the event of an accident. Disconnecting the battery Depress the parking brake firmly or move the gear selector lever to position P. Open the trunk ( page 261). Disconnect battery negative lead 1. 344