The kits come from Russia and the latest is simply a dongle that you plug into the OBD2 diagnostics socket and it does the rest without any installation from you. I have the earlier one which needed wiring into the loom in the tailgate and was a pain to have to do. I cannot speak for the latest version but I will say that the earlier one worked OK with a slightly longer delay between pressing the remote and the tailgate closing compared to pressing it and the tailgate opening, but the delay can be seen as a safety factor avoiding hitting anyone standing by the tailgate. Having owned this mod for a couple of years I find that while it works OK, there are far less times that you need to use it than you imagined before you bought it! But since I love gadgets and modding my cars, I'm still happy to have the facility which Volvo obviously saw as a possible safety issue and didn't include.
The guy selling these is:
Evgeny Kosourov Email:
modulorder@mail.ru