Guys and Gals,
This place is in Richardson TX. I have used them before on other vehicles, but notthe MB yet. I called them because if my trip odo not working.
I was quoted $150+tax if I bring on the speedo cluster to fix it, and that includes replacing all the gears in the odo and trip odo, cleaning and lubing the speed indicator.
Here is there website:
http://www.zepco.com/index.html
They also do custom work, like when you do a tanny or diff swap, they can source out gearing so that you can sill use your original speedo. They have the stationary rollers for the testing like the smog test people use.