06RX330 - I hear the same tapping noise which comes at around 90KPH. I tried playing with the sunroof open/close switches and thought I found the solution since it silenced the noise or made less frequent tapping but it is still there. I tried pulling the seatbelt anchor but didn't find it. I saw an unscrewed rear wheel well bracket and tightened it but didn't solve the tapping. I moved the roof rack bars to the rearmost but didn't fix it. I even taped the bar to the locking mechanism to no avail. I suspect that the sound is not actually coming nearest to my left ear but from somewhere else. I suspect the the tapping sound is just being projected or bounced from another area. I will try to borrow a stethoscope to pinpoint where the sound is coming from.
