Hi everyone! i have a 2000 A6, and its got the RNS-D type navigation, and i want to change it to some aftermarket unit or to the RNS-E unit. First:What I like to know is, is there anydifferences between the preface/facelift center console desing? Because i found a lot of installing/mounting kit with very different year specificaions. And its not cheap, so i don't have the luxury to try out some. And Second: which RNS-E can be retrofitted in the place of the RNS-D? what upgrades/changes needed to be fitted? i Considered it because of the above mentioned problem, and its nearly at the same cost. Thanks for the help!