- Key fob malfunction: If your key fob is damaged or faulty, it could accidentally send a signal to open the windows. Try replacing the battery in your key fob or having it reprogrammed.
- Faulty door switch: The electric window switches on your Audi A4 are located on the door panels. If one of these switches is faulty, it could cause the window to open even when it's not being pressed. Try pressing and releasing the window switches a few times to see if the problem persists.
- Electrical issue: There could be an electrical problem with your Audi A4 that is causing the electric windows to open. This could be anything from a loose wire to a faulty fuse. If you're not comfortable troubleshooting electrical problems, it's best to take your car to a qualified mechanic for diagnosis and repair.
It is also possible that your mechanic accidentally left the windows open when they inspected your car. Be sure to double check with them to ensure that they didn't leave the windows open.
If you can't identify the cause of the problem yourself, it's always best to take your car to a qualified mechanic for diagnosis and repair.