What are the most common issues with the Audi A2's engine and how can they be addressed?

I've recently acquired an Audi A2 and want to know more about potential engine problems, as well as tips on how to maintain and fix them.

One of the most frequent problems with the Audi A2 engine is oil sludge buildup, which can cause significant damage and decrease performance. To avoid this, make sure to change your oil regularly according to the manufacturer's recommendations, and use high-quality synthetic oil.

Another common issue is with the ignition coils, which can fail and cause misfires. It's essential to replace them as soon as you notice any signs of trouble, such as a rough idle or difficulty starting the car. The good news is that they are not very expensive and can be easily replaced yourself.