Yeah the air pump I know of (mine fell off mysteriously), figured they went to a diff cam profile that doesn't self EGR like the '89 and older did. Now I know.

Now I wonder if the '90+ have a hotter cam profile (somewhat) and just used the EGR to drop the NOx lower than the '89 and earlier.

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]