Last month I bought a used drivers seat for my car. I bought it looking for a couple things.

Good leather - This was a must, as mine is falling apart.
Good lumbar support - This I wouldn't know until I got the seat and plugged it in. I wanted a working one when I'm done with the swap.
Good seat memory module - Again, have to plug it in to test it. I've lived without this for 5 years, it's not a biggie.

So I got the seat and immediately started inspecting it. Upon doing so I found the wiring harness was all hacked up on the bottom! (The seat memory module had also been removed, but no biggie) This worried me as that harness does go to an airbag in the seat. It's one thing if the other features don't work, but ya don't want to mess with that. So I contacted the seller and they actually sent out a new seat pan with a complete harness that hadn't been hacked up. All the motors were still attached, along with a memory module this time! Woot!

So tonight I set about the process of swapping wiring harnesses. Took me forever to figure out how to get the back of the seat off, but I finally did. The lumbar support here is broken as well. It's a used seat, and the breaks are pretty common. So tomorrow I'll head over to Audi to order one... there goes another $150 for a piece of metal the size of a coat hanger that is broken. But it will be nice to have my seats in good condition again!