Hi, can anyone help, basically bought an e46 last week, the previous owner had probs with the battery draining, they said that it was the auto button on the digital heater display that was draining the battery as it won't turn off. The battery has drained twice on me in a week, I've noticed that it seems to be draining when the bonnet or boot is open longer for quite a long time approx 10-20 mins. It doesn't seem to be draining because of the auto button on the display, I do think it is something to do with the bonnet/boot been left open and if so what is it? I have had the alternator checked too and that is fine.
Would appreciate some help to save my pennies.