Disassembling the rear is no big deal. If you'd ever done it, you'd know that. Usually, you just lift the seat bottom, and it just pops up. The rest doesn't look bad either. Only risks are from welding splatter IMO. And if you ever take apart your car, you'd see there's already lots of felt in various areas to prevent squeaks, so that in and of itself isn't again something to freak out about.Thank you Tim.
Wow... Disassemble the entire rear of the car, weld and hope nothing inside the car gets damaged, put on some felt pad that will peel off after a month in the AZ sun and hope for the best? BMW has to be joking with this repair...
Bye bye new car smell and hello rattles and gouged leather.