I am chasing a serious driveline whine/roar in a 300 SD (190K) I just bought. At highway speed it sounds like white noise AM radio static. Not much vibration felt, but what I do feel shouldn't be there. Diff oil is fresh. Halfshaft boots are cracking, but intact - I am planning to go ahead and replace the axles. Throwing the cheap parts at it first, I'm now changing my driveshaft center support bearing, and discovered a bad u-joint. To me, this bad means sticky, with a pronounced "notchiness" in its travel and a pronounced detent feeling in the dead center position. With the shaft lying horizontally, the detent effect is enough to keep the u-joint centered (against gravity) in one axis, but it will flop freely through its range of travel when the shaft is turned. Also, immediately upon first picking up the driveshaft and without being asked to check the U-joint, the machinist that pressed on my bearing asked me what was my plan for the bad U-joint, so there's a second opinion. So, I'm looking for a place that repairs u-joints and found Driveline Service of Portland - specialists in Mercedes driveshafts. Does anybody have any experience with these guys? Their website (http://www.driveshafts.com) tells a convincing story with key words like reasonable and proprietary process - at least it looks good to me. I'm waiting for a quote on one of their rebuilt driveshafts.

Any other favored options for u-joint rework on a 126?
Thanks, Big Mac