this is getting even more confusing, Europe parts seem to believe that is the correct spec battery for the car. But that is just the opinion of the guy on the parts desk-based what it says on his own website. In other words he doesn't know, so I rang BMW. My local dealer (helpful as ever) or should I say the guy on his parts desk, at first he said 70 A is fine, then he decided that as the car is a six cylinder and an automatic, don't ask me why. It may need a battery with 80 A. Basically I need to find out what the car came with from the factory. BMW can help me out with this as long as I'm willing to pay a pound a minute for their advice over the phone. Can anybody point me in the right direction of a website or something similar that may have this information on it, as I'm having trouble finding one. I repeat once again, no power is draining from the car anywhere, but once you've had a bit of cold weather, or the car has stood for more than one day it won't start. My instincts tell me the battery is too puny for the car, but hey what do I know I'm only a monkey!