The auxiliary battery in a 2005 Mercedes-Benz E500 is located in the trunk, behind the right-hand side panel. To access the auxiliary battery, follow these steps:
1. Open the trunk of the E500.
2. Locate the right-hand side panel in the trunk. It is held in place by two plastic clips.
3. Pry open the two plastic clips and remove the right-hand side panel.
4. The auxiliary battery is located behind the right-hand side panel. It is a black box with a red positive terminal and a black negative terminal.
Note: The auxiliary battery in the E500 is used to power the car's electrical system when the main battery is disconnected or discharged. It is important to keep the auxiliary battery in good condition to ensure that the car's electrical system functions properly.
