If you were at the Irvine meet a few years ago, you may remember Jimmy Francis who turned up with his gold 6.3 for sale. He and his friend Sean have a business fixing up clean original low mileage Mercedes-Benz cars, mostly W123 Diesels, and their work is impressive. The pictures are great too. The page kind of goes on forever if you keep scrolling down. There are some pics of the 6.3, so it's not completely off topic.
http://www.flickriver.com/photos/mercedesmotoring/popular-interesting/