Random question, but when I close my boot its kind of slams shut in an un Audi like close. There is a vibration noise that comes from somewhere when it shuts. Could it be the struts? I was advised that the car had a bike rack used on the car, so could it be the weight of that over time? I know its not really a big issue, but I like the car to be as perfect as possible and would like to sort it. Any thoughts would be appreciated.