oh the v-12 wire harness geesh. that compartment is so tight. If you maintain sanity doing that job the V-8s is easand the 6 is dead simple relatively speaking.
Never did it myselffor the V-12 but looking under there at the wires and harness and what you have to do to get to it I can tell it's a PITA. Hey if the guy/gal that can do it for $46 dollars can do agood job and you're comfortable then have at it. If he/she knows Mercedes they should not have much problems on the inline 6 plenty of space to work relatively and things are laid out a bit more wrench turner friendly.