[tricky trev]

Before you buy a new X5 .....close the drivers side window vent, have the fan speed on low or medium. If it's anything like mine it'll drive you mad, a whistling noise that varies in pitch depending on speed of fan.
THIS IS A BRAND NEW £60,000 CAR.

The response from BMW listed below.


As you know, we have had the car in for diagnosis, and deemed the car to be operating normally; that is to say there is nothing faulty with the car, and the noise you are experiencing is a characteristic, due to the additional ventilation hole in the pipe which feeds cool air to the rear of the instrument cluster. Clearly, we would not want to cover or obstruct this hole, as this could cause additional issues which would then potentially not be covered by warranty.