When the Stop/Start feature has the engine off, the Rear Defrost won't turn on. The seat and steering wheel heaters will turn on, but not Rear Defrost. Makes some sense not to turn on the high current load when the alternator is not turning, but I think it should lie, turn on the indicator, but not turn on the high current load until the engine is running once more. As it is, I get the sensation the Rear Defrost is broken.