Why does my Audi 80 have trouble starting after sitting overnight?

I have a 2006 Audi 80 and recently it has been having trouble starting after sitting overnight. The engine will crank but not turn over. Once it does start, it will idle pretty rough for a few seconds before smoothing out. What could be causing this issue?

The most common cause for this issue is a faulty fuel pump. It may not be able to maintain enough pressure in the fuel system overnight, causing difficulties with starting the engine in the morning. Consider getting it checked and replaced if necessary.

Another potential culprit could be a weak or dead battery. As the temperature drops overnight, batteries tend to perform poorly, especially ones that are old or close to dying. Get your battery tested and replaced if needed.