Rear shoulder belt anchor point

[dezelsky]

I spoke to Bristol Cars Services recently and was quoted £700 to install rear inertia belts in my 411 S4. This seems reasonable to me and am planning to proceed. I believe they weld a strengthening bar under the parcel shelf, so I am not sure that the end result will be aesthetically pleasing. It would be better to mount in tandem with front belt anchor to the wheel arch so the belt mechanism can be hidden, but presumably this would require considerable load strengthening (I have also encountered serious corrosion problems here). There may also be a space space restriction for mounting 2 inertia mechanisms.