Hi I have a 2006 S Line 3 door with 97,000 Miles, since picked up the car there has been a metallic rattle which is quite loud from underneath the car. It occurs when going over rough ground and bumps. Jacked car on axle stands today and nothing is loose underneath (heat shields, brackets etc.). It is like a 'tingling'/hollow sound as if something is loose. Has anyone had this problem as I would like to get to the bottom of it...i have people looking around when driving past. It sounds as if coming from the rear of the car.