Hello, I have recently had a problem that my front and rear heated screens don't work, this problem is intermittent. I recently went for a service and they said my battery is at 50% and when it gets that low the car will shut off some functions to stop loss of battery. They said nothing wrong with battery itself when I suggested buying a new one, just said give it a good charge then it will be ok. I have charged it, and the problem still there. Although I've never charged a battery before and the lights didn't seem to go the whole way. I took it to a local garage to enquire about a new battery, they tested it and said there was nothing wrong with the battery. Has anyone else has similar problems with heated screens? I would have thought the car would shut the stereo or the climate control off before the function to actually clear your screen? Thank you.