i have a B7 A4 with a double din head unit with bose and a parrott bt kit. I can buy an rns-e from an S3 (the new model), So is it the same as the a4 rns-e except that the top corners are rounded off? and If so will it still fit? what else would i need to retro fit it? So far i think i need radio removal keys, an antenna adaptor and rns-e adaptor from kufatec, the rns-e, the gps antenna itself and the 2007 europe dvd. Anything missing? Is it also worth putting in the audi ipod connection at the same time? And finally, should i upgrade my parrott bt to the audi bt?