Hi- my A3 Cabrio is coming to 6 months old in sept, the engine is becoming louder (only way to describe sounds like an old taxi!!! ) as time has gone on, I had a Citroen DS and it never sound this loud at 3 years old, it does happen a lot when it starts from cold? Anyone had any experience? Also finding out the car was manufactured in 06/2016 and I reg. it march 2017, it also seems to use a lot of fuel? Any advice would be really helpful, thanks in advance