How to troubleshoot malfunctioning tail lights in Audi A5?

I have recently noticed that my tail lights on my Audi A5 are not working properly. I have checked the bulbs and they seem to be fine. What could be causing this issue and how can I fix it?

First, check the fuse for your tail lights. If it is blown, replace it. If the fuse is not the issue, then the problem may lie in the wiring or the switch. It is recommended to bring your car to a reputable mechanic for further diagnosis and repair.

Check for any loose or corroded connections in the tail light wiring. These can cause issues with the lights functioning properly. You can clean or tighten any connections that appear to be damaged.

Another potential culprit could be the tail light relay. Replace it with a new one if necessary. You can also try resetting the relay by disconnecting the battery for a few minutes and then reconnecting it.