At the end of May my wife took delivery of a new Audi A3 1.6TDI Technik convertible. Within three weeks the hood developed a hole and the car was off the road for two weeks for a new hood. The radio never worked from new and has only just been replaced. One of the main reasons for buying this car was the claimed fuel economy - over 70mpg on the extra urban and over 65 mpg combined. To date, and with careful driving, we have yet to better 47mpg. We have taken issue with Audi over this and the garage has been helpful to the point of offering to replace the vehicle on a like-for-like basis (bearing in mind the other problems we have had). We have heard from other people that this engine is the problem, in which case we would have to think of an alternative power unit - possibly the 2.0 TDI. What are your thoughts on this engine and have you heard other complaints about it?