a4 central locking in to a s2 avant

[Tractor Dave]

You can ignore the ir part if your car does not have it.

Factory alarm makes it even easier, then there are switches on the lock cylinder.
You can connect the other outlet to driver door. One click on the remote opens then driver door, two clicks open all other doors.

M2ki - You are a very clever guy. Let me know if you are having a holiday in Wales anytime and you can call by and do some mods for me