Based on the amount of money you're likely to spend (or not spend) on the car, I think you'd be better off taking it to one of the indpendent techs that Moderate the site, such as Steve Brotherton's shop, Continental Imports in Florida, Donnie's shop in Georgia, MB Autowerks, or even the shop that Ashman recommends highly, Mr. MB Motors in Tarzana, CA.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".