Why is my Audi 80 emitting black smoke from the exhaust?

I noticed that my Audi 80 is producing black smoke from the exhaust. I'm worried that it might be a sign of a bigger problem. What could be causing this and what should I do?

It could be a sign of a fuel system issue, such as a clogged fuel filter or faulty fuel injectors. Have a mechanic check it out.

You may be using the wrong type of fuel. Make sure you're using the recommended fuel for your Audi 80 model.