I've bought a 2002 1.9 tdi quattro se avant that has an RNS-D factory fitted but want to upgrade to the later RNS-E. How do i know which version to get as looking on ebay they all look the same (for a4's) but have various part numbers and h/w versions.
If this post is better suited in the ice forum could a mod please move it.
If this post is better suited in the ice forum could a mod please move it.