Thanks for all the input. It's nice to confirm that my mechanic knows what he is talking about.
I did some surfing also since posting. The Beru website http://www.beru.com
is pretty slick, and as you said, M.B. DOC, they are now being used in new MBs as well.
P.S. I just changed the oil and put the Beru Ultra (not the Ultra-X, which have the 4 electrode design, similar to the Bosch Platinum +4) plugs in my 300E. Drove it 40 KM and it's running as smooth as silk...
2007 E550 4Matic - 61,000 Km - Iridium Silver, black leather, Sport package, Premium 2 package
2007 GL450 4Matic - 62,000 Km - Obsidian Black Metallic, black leather, all options
1998 E430 - sold
1989 300E - 333,000 Km - sold
1977 280E - sold
1971 250 - retired
"And a frign hat. They gave me a hat at the annual benefits meeting. I said. how does this benefit me. I dont have anything from the company.. So they gave me a hat." - TheDon