Hi There. Does anyone know if the Audi RNS-E A4 Sat Nav / Navigation System or the VW RNS510 RNS 510 MFD3 DVD system work in the A6/RS6 variant? I'm looking at upgrading the satnav system in my car but I'm a little confused as to which models to buy. I've seen the RNS-E system in an RS6 before but I have no idea exactly which model it is. Is it the connectors or the way the system fits in to the dash that is the issue? Cheers Dave.