I checked with a friend of mine in Chaplin's service department... he brought out 'standard charges' book that shows what a dealer is allowed to charge for a job.
VW says that labor should be 3.3 units and mechanics charge $79/hour. Most dealers will quote you 4 units though, they can pad with whatever they like to get $500 plus for the job.
$260.70 plus however much your own parts ordered on line cost.
If they're good and can do it in under 3.3, that's what they'll charge you.
I called each of the Dealers within 30 miles of Bothell and they each quoted the same labor rate except for Campbell Nelson who said they'd do it for $400 p&l.
Two things though, the mech sounded clueless and mentioned that they "really don't see many TDI's with that many miles" and mechs from the other shops would (grudgingly) recommend any other dealership to do the same job EXCEPT C-N VW.
Just my $.02 (plus tip)