THAT was another discussion I had with my tech, but it related specifically to the 300E rough idle issue. I've written it elsewhere and it can be found on this forum, but Mercedes has changed the injectors on these cars and if you have the old ones, you may have a rough idle condition due to the spray pattern.

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David

His:
2003 Dodge Durango SLT
2002 BMW E39 530i Sport
1988 Mercedes 300TE
Hers:
2003 Chevrolet Suburban
1999 E430