Thanks Supersteve,
Will have to do that, the problem is I would have to keep taking it back to the mechanics to keep resetting until I found the problem connection (not many - only the direct feed and the remote feed)- Just didn't know if taking direct feeds from the battery was a no no for BMW electricals as I understood that some if not most of the electricals run off a pulse current rather than the normal? Do you know if there is a way to reset the air bad sensor light without going to the mechanic?