There was talk in the Dealer Info, Reviews, and Experiences forum about posting trusted independent (non-dealer) Sprinter service locations to each State section, since the Dealer section is for dealerships. Putting a thread back into the hopper here;
MATRIX INTEGRATED--Bend OR and Portland OR locations
I've had Matrix Integrated work on my cars for several years so, knowing I had a 2500 144, they told me when they decided they were going to service and repair Sprinters, a development I passed on in an earlier thread. Apparently, as of a few weeks ago, everything got set up and they are now...
sprinter-source.com