Join Date: Oct 2002
Location: Home of the Nimbus
Just another idea for you to check. I experienced exactly the same problem as you, after 3 days of standstill, the battery was dead.
I traced it to a new radio/nav head unit that I installed. It appears that even though it plugged right into the standard Alfa wiring, Alfa has a definition of standby power very different from the most head unit manufacturers. The 12V goes into the head unit on 2 wires, one is supposed to be disconnected when the igintion is turned off, but this never happened with the Alfa wiring. They were both on all the time, hence the drainage. Might be worth checking.
Alfa driver by choice