Had my model 3 for 6 months now and have loved it. However it has now developed a vibration that comes when not accelerating . It gets very loud when above 45 mph and I'm worried about the cause. I will book a visit from tesla as service depot is an hour away and 5 mins drive is bad enough. Has anyone got a clue what it would be. Its done about 7500 miles and tyre pressures are at 42psi. Its sounds like a rotational vibration as changes frequency with speed.