Hey, Doug, it was good to see you at the park in Newport last Saturday. Very clean car.
I'd post this in the Hot Rods section. That is where all the "500E-heads" hang out.
Try asking Italianbenz (Guido). He has a 93 500E, and works at the Mercedes dealer in Torrance off of PCH.
I've seen postings from other members who have had their cars worked on by him by request.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".