Hi guys!
My husband took our '84 Euro 280sl in for smog testing a few weeks ago - we were concerned as no converters (as far as I know) were installed on the car... We purchased it last year from a man in VA and it had passed there. Our car passed, here in Connecticut, with the following results:

HC: 166 PPM (limit 167 PPM)
CO% 0.53 (limit 0.53%)
NOx: 406 PPM (limit 1167 PPM)

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'91 500sl; '88 300TE; '84 280sl; '83 240d; '76 300d; '75 300d; '72 220d... Okay, so we LIKE Mercedes...