No deflector, but some wind noise
I get a whistling that gets pretty annoying when I hit about 130km/h / 80mp/h or so. It helps when I close the sunshade, but it is still noticeable. I looked at the sunroof from the outside, and it isn't perfectly flush, but looks pretty even across the roof. Never had a wind deflector, and when the roof is open, it is whisper quiet (never had it open at 130km/h, though).
Could the wind noise be coming from the strange channeled side mirrors?