To figure out why your car's door lock and windows are malfunctioning, you would need to:
* Check for common issues:
* Low battery: A low battery can affect electrical systems, including door locks and windows.
* Fuses: Check the fuse box for blown fuses related to the door locks and windows.
* Wiring issues: Inspect the wiring harness for any damage or loose connections.
* Switch problems: The door lock and window switches themselves can malfunction.
* Actuator problems: The motors that move the door lock and windows can wear out or fail.
* Consult your owner's manual: The manual might offer troubleshooting tips and explanations of potential issues.
* Contact a mechanic: If you can't identify the problem yourself, it's best to take your Audi A4 to a qualified mechanic for diagnosis and repair.
Remember, it's important to have any car electrical issues diagnosed and repaired by a professional to ensure safe and reliable operation.
