I noticed that you are in Atlanta.
How far are you from Sugarhill?
Benzmac's (Donnie's) and Bill Wood's shop, MB Autowerks, might be a good place to have your car looked at if it's not too far.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".