Why am I experiencing a sudden decrease in engine power in my Audi A5?

I recently noticed a decrease in engine power in my Audi A5, even though the car is well-maintained and has low mileage. What could be causing this and how can I fix it?

One possible reason for this decrease in engine power could be a clogged air filter. As the filter becomes dirty, it can reduce the amount of air flowing into the engine, leading to a decrease in power. I suggest checking and replacing the air filter if necessary.