Possible Reasons for Window Issues After Battery Change:
* Power Reset: When you disconnect the battery, you essentially reset the electrical system. This can cause some modules to lose their settings, including window control modules. The solution here is to recalibrate the windows, a process specific to your E320. Check your owner's manual or a repair guide for instructions.
* Fuses: A blown fuse in the window circuit could have been overlooked during the battery change. Check the fuse box (often located in the engine bay or interior) for any blown fuses related to the windows.
* Window Motor Issues: While less likely, a window motor might have been damaged during the battery change process. This would require a closer inspection of the motor itself.
* Wiring Problems: There could be a loose connection or a damaged wire within the window circuit. Check the wiring to the window switches, motors, and control modules.
* Control Module Malfunction: The window control module itself could have been affected by the power reset or have developed a fault. This would require a diagnostic check and potential replacement.
Troubleshooting Steps:
1. Recalibrate Windows: Begin by following the specific recalibration procedure for your E320. This is often a simple process of cycling the windows up and down a few times to reset the limits.
2. Check Fuses: Carefully inspect the fuse box for any blown fuses related to the window system.
3. Inspect Wiring: Check the wiring connecting the window switches, motors, and control modules. Look for any loose connections, damaged insulation, or signs of corrosion.
4. Test Window Motors: If you have access to a multimeter, you can check the window motors for power and ground connections.
5. Consider a Diagnostic Check: If the problem persists, consider taking your E320 to a qualified mechanic for a proper diagnostic check. They can identify the specific fault and provide a solution.
Important Note: Always disconnect the battery before working on any electrical components in your car.
Let me know if you have any other questions about your E320.
