I installed it.
I only hooked up the parking light flashes, lock and unlock and was going to hook up the trunk release. That was the only problem I had. I couldn't get the trunk release to work. I checked everything and I believe the relay was wired correctly but no luck. I finally said screw it and figured I could live without it!

If you hooked up a Astra 50 and got the trunk to work I'll give it another try and report back with details.