I was stuck in eastern Washington years ago with a bad bearing in a 300E. I limped into Wenatchee and got out the phone book. No Foreign car shops listed. I then called the Chrysler dealer service manager and asked him for advice. He gave me the name of a local garage that worked on Mercedes. They fixed the problem after waiting overnight for a parts delivery out of Seattle. You might want to try this if you get nowhere. Have you checked the "Good MB Shops" forum on this forum?
Anziani
'97 CL500
'95 E420