I have been experiencing a noise which I describe as a "diesel knock" even though the car is not diesel. When slightly accelerating the noise begans, goes away at a slightly higher speed and returns at very low speed. Twice I have taken the car to the dealership for inspection and both times they tell me this noise is just the way a kompressor is. They tell me I will hear the rattling, clunking noise when the kompressor clutch engages and disengages.

Has anyone had the same experience and is there anything that can be done about this?

I appreciate your time and feedback.