As title suggests is there an easy way to check that my exhaust is fitted correctly. I've had a rattling sound coming from the rear of my car, today I noticed that the back of the exhaust moves about quite a bit. I assume this is because its diesel, its sort of vibrating but when you put your foot on it slightly the thing rattles and thats what I can hear when driving.

Is there an idiots guide to checking if its fitted to the car correctly or is this normal for a diesel?? Sorry if this sounds a stupid question but its my first diesel.