How to troubleshoot Audi A2 starting problems?

I have been having issues starting my Audi A2 and I am not sure what the issue could be. The engine cranks but won't fully start. Any ideas on what might be the problem?

First, check the battery terminals for any corrosion or loose connections. This is a common cause for starting issues. If that checks out, then you may have a faulty starter motor. It's best to have it checked and possibly replaced by a certified mechanic.

Make sure you have enough fuel in the tank and that it is not contaminated. Old or bad fuel can cause starting problems. If that's not the issue, then it could be a faulty fuel pump or a clogged fuel filter. Have a mechanic take a look.