All this fiasco reminds me ... of my personal dealings with VW...I orderd a new golf and imported it into the uk myself. The fuel economy was amazing 75mpg for a 2L GTTDi ..... however, when it had its first service and was reprogrammed by a uk vag dealer the mpg went down to 48mpg.... I had massive rows with the dealer...but I could get nowhere ....... I have often wondered whether it had a special eco map (perhaps for US!!!)