I am new here ,so please be gentle with me,,I have an issue I hope someone could advise me on,I have a 2012 Sport HSE,I have noticed a strange vibration ( similar to a flat tyre noise) after driving on the motorway after 15 mins,I slow down and it goes,,it doesn’t happen all the time, just when it fancies,it’s happened 4 times in the last 3 months,,and it’s bugging the hell out of me,,,any ideas please.? Thanks in advance.