If your car is manufactured before 2009, the can gateway needs to be replaced to avoid battery drain.
7N0 907 530 _ _ .Part Number Send Random
Sovle Install RCD510 RCD330 plus Battery Drain Problem
It is Not Plug&Play . You need to do coding via Vcds.
Befor the gateway replacement, you need to use Vcds of VGA COM to enter option 19-gateway, and then enter to installation list ,remember the unit list you checked, and then reselect these in the new gateway.