I have seen a couple of companies that advertise in the Mercedes Star Magazine.
These companies are said to do good refinishing work.
Heritage Woodworks: 888-255-3523
Madero Concepts: 800-800-1579
Heritage in particular has a stellar reputation.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".