I have a 1999 ML430. I am experiencing very loud wind noises from Moonroof when closed - to the point that on highway I have to close the screen to regain any kind of quietness.

The first time I brought it in MB claimed that the roof rack was causing the air noise. Although I didn't buy this at the time, I was a little fed up with the service center so I just said "whatever".

I would like to get this fixed. My roof rack has no cross bars i.e. it just runs parallel to the direction of travel, so I don't think this is the problem.

Before I bring the car back to MB, since I don't believe their diagostician, has anyone experienced this and what is the cause/solution?

Thanks... eric