Hope anybody can shed light on this problem. I am running a 90D delivered late Sept 2015. The car has been great. It took me from suburb of Toronto to southern-most point of the continental USA. Just one issue, I can hear a pretty low whining from the front while sitting in the car which has range mode enabled. The car is quite quiet, so the whining is clearly audible. The whine becomes higher pitched when the car accelerates. This has been there from day one. This does not happen when range mode is off. Service center gave me different answers and I am quite baffled.