Found a couple of A4's I might be interested in, but one of them the dealer is staying kinda silent. I've asked him a couple of questions and not got much detail from him really. Looking at the dash, what is the stereo setup called on these two cars and do they both have sat nav? Coming from a VW which has the RNS510 swappable units etc., I'm unsure about the levels of trim and what comes with what. I do know that it's not an easy job to retrofit the satnav though, so it's kind of important. The second one appears to be the better spec unit and would have sat nav, but it's a lower spec car overall and doesn't have the level of equipment the first one has. The first one is the one to have if it has sat nav I guess. Unfortunately it's a couple of hundred miles away so not handy to just pop in really. Also, can the nav units be updated with new maps/firmware etc. same as VW's? Cheers.