Yeah, it seems like all Mercedes engines fall into the category of "gross polluter", and have to undergo the more rigorous testing.

Even when they pass, they just barely do so.

Your engine must be in really good shape to run so clean.

__________________
Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".