Hi All My Father has recently bought a A4 Avant B7 and some of the interior trim is scuffed. I would be looking to replace the the rear panel upper that you see in the boot, the rear upper panel on the left and the A pillar. How easy are these trims to replace? and do they also have airbags attached? Given the similarities between the B6/B7, if I find a good B6 avant does anyone know if I could use these trims in the B7?