Hi,
The highline version is slightly more difficult. The control unit sits behind the trim on the right hand side of your trunk. Camera connects to the control unit and control unit connects to RNS. you also need to connect can bus wiring and power, these can be sourced from the RNS and power from fuse box.
Lowline version is easier that it just connects directly from your badge to the RNS510 and from badge to positive of reverse light so that the badge activates when you are in reverse.
Coding is simply done on rns and the control unit.
The only problem with retrofitting highline version is that I don't think that anyone has successfully calibrated the camera. This certain boards with patterns that are from vw.
As far as proceudre, you can basically take the procedure from the tig or golf and use it for passat but you probably won't need to do something drastic like cutting panels such as what is required in golf v. I have done badge retrofit in golf v so just ask if you have any questions. Obviously, trim will be different but you just figure it out on what trim needs to be removed to access the path for wiring. Just make sure that you use some decent trim tools. I have been gathering information for this retrofit and put it on my site here - RVC Plus Retrofit | passatv6.com
Car-Systems have all that you need to retrofit either version, I have purchased various parts of them in the past and their service is great with very fast shipping.
Hope this helps.
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