Sorry to raise a thread from several months ago, but my 2008 R32 is in for this now.
Harness price (driver side only, passenger was apparently OK for me) was only ~$160 according to my dealer. Labor from them is $550.
Kind of had to let them do it because they already had the spoiler off (we originally thought the CHMSL was bad/failed, turned out to be broken wire in the harness, hopefully they still warranty the CHMSL instead of trying to charge me for that too).
Same symptoms - "reverse light out" warning on MFD, both reverse lights not working, hatch won't open, no rear wiper, and no cargo light.
Broken wire on driver's side (would have taken a picture but camera app kept crashing!). Used a male/female connector to put the broken ends back together and electrical tape around the cracked insulation on seven other wires.
Good to go now. We will so how long my thirty cent repair lasts...