I hesitate to recommend anyone without personal experience with their work, and I have never had anyone work on any of my cars. But you haven't had much luck, it seems, so I'll give a second-hand recommendation.

I bought my '83 300cd from a fellow in west Little Rock. It was (is) in impeccable condition mechanically. He used the local dealer mostly (Riverside Motors) along with a local shop, Pleasant Valley Automotive at 1905 Hinson Loop Road, 501-227-0619. Pleasant Valley replaced engine mounts, oil cooler lines, glow plugs, hand fuel pump, and such. Prices were reasonable, with very fair parts pricing. They also did his lube, oil, and filter changes. ASE certified technicians, according to the invoices, and apparently familiar with these diesels. Wish all my cars had been as well maintained before I got them.

__________________
Dale
'67 Volvo 122
'79 Rabbit Diesel
'79 M-B 300TD
'82 M-B 300D
'83 M-B 300CD
'85 M-B 300TD
'86 Isuzu P'up TD
and a couple of Hondas