Early 104s are CIS right? Ever checked to see if the CO is set properly?

In my experience HC is unburned fuel and NOx is too lean of a mixture.

How old was the oil in the crankcase? This sounds trivial, but fresh oil helps pass too.

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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]