I am experiencing a resonating vibration when I go over 55mph or 80kph. It is slight enough that the dealer says he does not experience it when they take if for a test drive. It feels similar to when the wheels are not balanced properly. I feel it coming from the RHS (right hand side). (My steering wheel is on the LHS) I have checked on other forums and this seems to be an issue other XC40 owners are experiencing and have engaged their dealers quite extensively to try and solve the problem without success. It seems as if there is a kind of aerodynamic rhythmic resonance at these speeds. Has anyone else experienced this?