How to troubleshoot a faulty engine in my Audi A6?

My Audi A6 seems to have some engine troubles. It makes strange noises and jerks while driving. What could be the issue and how can I fix it?

First, check your spark plugs and spark plug wires. They may be dirty or worn out, causing engine misfires. Also, make sure your air filter is clean and replace if necessary. Low air flow can also affect engine performance.

If the issue persists, it could be a problem with your fuel system. Check your fuel filter for clogs and consider getting a fuel injection cleaning. You may also need to replace your fuel pump.

Don't forget to also check your car's computer system for any error codes. This can help pinpoint the issue and save you time and money in repairs.