2006 Mercedes E-Class Owner's Manual - Page 451

Practical hints Batteries Your vehicle is equipped with two batteries: Main battery (battery for starter and electrical consumers; located in the trunk) Auxiliary battery (back-up battery; stabilizes the electrical system if the main battery is discharged; located in the engine compartment) The main battery is in the trunk under the luggage box. Remove the luggage box ( page 423). Vehicles with spare wheel Warning! G Failure to follow these instructions can result in severe injury or death. Observe all safety instructions and precautions when handling automotive batteries ( page 326). Never lean over batteries while connecting, you might get injured. Battery fluid contains sulfuric acid. Do not allow this fluid to come in contact with eyes, skin or clothing. In case it does, immediately flush affected area with water and seek medical help if necessary. A battery will also produce hydrogen gas, which is flammable and explosive. Keep flames or sparks away from battery, avoid improper connection of jumper cables, smoking etc. 1 Negative terminal 2 Positive terminal Warning! G Jump starting must only be done using the main battery in the trunk. 450