Hi, looking at selling my A3 very soon and getting an A5 3.0 Tdi sport or s-line probably around a 2008/2009 model. I understand the fantastic difference in the B&O sound system but I'm at a total loss when it comes to the difference in the Sat Nav and MMI options that were installed, the only difference i see when looking at cars for sale (online not up close) is the differing location of the twirly knob thingy (how about that for techy!) that you use to control the system, it seems to be on the dash behind the gear stick on some and in front of the gear stick on others.
Is there a link anywhere to an explanation of the differing systems and there merits, pictures to see the physical differences and a guide to the best / worst setups would be fantastic.
thanks in advance