I wonder if you heared of such a strange problem before?
i installed the 3305 in my E90 and all is working properly, except two strange things;
1. When i press the disarm button on the 3305 remote, normally the doors open, but sometimes the doors unlock then lock back again!! This happens randomly.
2. Another starnge thing happens; when i use the 3305 remote to unlock the doors, then get into the car, and take the car keyfob and move it to insert it into the key hole, the doors will lock by themselves!! The alarm does not arm, its just the doors that get locked.
by the way, the 3305 is installed in W2W mode. No remote start is installed.