Right then guys here we go
Pull up your seat base by grabbing it from the back. And place foam down between the seatbelt anchor point and the side plastic panel as shown here, I shoved quite a think sponge down there.
Theres a panel fixing point behind the belt, that was loose with me and I couldn't tighten it, so I placed foam between the panel and the car as shown here.
Finally when the seat is put back down I shoved an old halfords washmit folded over down between the seat base and the side panel
Hope that fixed it for you guys
Heres the other things I've done last weekend which has eliminated other rattles, but not the main rattle we all call the 'seatbelt rattle' The above steps should fix that
Placed foam where the seat belt click points are:
Placed cheap dynamat on the clip points here(in silver) also put pieces of sponge, but I dont think this is needed. Also put a thin pice of foam in between the tweeter cover and the panel with a very thin screw driver, this stops it moving around.
Put some insulating tape around the seat latches:
Finally I placed 2 layers of dynamat where the panels clip on the car as shown here, and made sure the cables are not moving, but sticking them down and putting pieces of sponge between the car and the cable in some places where it could rattle.:
Not shown in the above pics, but I ran about 4 layers of dynamat by the window under the plastic as shown by the red line here. The flash has caught a bit of it. But you cant see it in daylight. I put 1 layer in the other red bits, and I pulled the little cover where the belt comes out and places some dynamat under there to it clips more tightly. Behind the main cover where you can actually see the seatbelt assembly, I pulled off the little wobbly plastic things that go over the belt, their there to keep the belt in the reel, but I've pulled them off and it works fine.
Boot:
I also put dynamat on the edges on the panels on the boot to stop them knocking the metal, shoving foam down would do the trick I suppose. But as I pulled all the boot plastic off I placed dynamat on the inside edges of the plastics. Just tap areas to see what rattles and take if from there. Theres also cables behind the panels that go to the heated glass elements, they move around quite a bit too, so I taped them down and used some foam.
Hope that helps you guys. Try the top steps first.
Anyone know how to remove the seat backs?, so I can actually put something behind the panel so I can remove the washmit. At the moment the panel is stuck because the rear seat backs are in the way.