How do I know if the Audi A5's engine has been tuned?

I recently bought a used Audi A5 and I'm concerned that the previous owner may have modified the engine. Is there any way for me to check if the engine has been tuned?

To check if the engine has been tuned, you can take the car to a trusted mechanic or dealership and ask them to run a diagnostic check. They will be able to detect any modifications made to the engine.

Another way to check if the engine has been tuned is to look for any aftermarket performance parts such as a cold air intake or a different exhaust system. These are indicators that the engine may have been modified.

You can also check the engine's ECU (engine control unit) for any software modifications. This can be done by plugging in an OBD-II scanner and checking for any error codes or performance data that doesn't match the standard specifications.