Evan - For those of us who have the MSD80, does the $575 price include an upgrade to MSD81?
If so, how many hours should we expect for the install?
Yup, the kit for the N54s w/ MSD80 produced up to 3/2008 includes the newer MSD81 DME. We have to order this kit by vin (so be sure to include it w/ your order) and it ships directly from Germany. Not sure how that will affect the installation time or price - you'd have to contact your local BMW Service dept. for an installation quote.