What are the most common issues faced in the Audi A4's electrical system?

I have a 2015 Audi A4 and have been experiencing multiple issues with the electrical system. The car won't start, the alarm randomly goes off, and the windows sometimes won't roll down. What could be causing these problems?

The most common cause of electrical issues in the Audi A4 is a faulty ignition switch. This can also result in issues with the car starting and the alarm going off randomly. It is recommended to get the ignition switch checked and replaced if necessary.

Another potential cause could be a problem with the vehicle's battery or alternator. It is important to have these components checked regularly and replaced if needed to avoid any electrical issues. Also, make sure to properly maintain the battery and clean any corrosion on the terminals.