Originally Posted by Diver
Wondering the same thing. The review mentioned the air conditioner is connected to the lithium battery, but does not say if there is an electric compresor. The 2012 3 series utilizes an extra reservoir of compressed Freon to provide climate control when the petrol engine is off in the start stop mode.
Hopefully it works better than what they put on my 5 series. When it's truly hot outside, I have to disable that start/stop foolishness.