Quote Originally Posted by unity View Post
Very interesting. I'd like to know what the outcome is. I often leave my key in the ignition in the off position, but only for a few hours at a time not for a few days. However, you would not expect this to cause any battery drain.
Good Luck!
I seldom leave the key in the off position, only if I now I'm going to be using the car again in 30-60 mins. This instance, I must have forgotten completely and just left the key but am surprised it has caused the battery to drain as I can't think of what is requiring battery usage - the only thing I can think of is the beeping noise made when you open the door and still have the car in, but once you close the door it shouldn't make that noise anymore.

The lights, music etc were all off.

However, I can't even open my boot now or lock all the doors.