Yes, that's the noise.
BMW have responded to my repeated complaints and said that they would get the Dealership Service Manager to call me back. However, that was about 4 weeks ago and I have spoken to him before. He told me that BMW wanted to pass on that they considered this whining "golf cart" noise to be normal. A shameful response from an auto company. This will be the first and last BMW that I ever own... I can't stand it.