All X5 in the US comes with the "standard" or "non-comfort" windshield, which shouldn't cause such interference. I'm not sure if you can order the "comfort" windshield when ordering your X from the factory, but a few had been able to ordered it from the parts department when replacing their "broken" OEM windshield. It's know that these "comfort" windshields can be problematic for radar detectors, but those windshields would have a special "opening" up near the rear view mirror for such thing as radar detector, fast trak passes, etc... My V1 is working fine on my X and I know that I don't have comfort glass.