Any info on resetting emission control system on 1987 Mercedes 1987 420sel?

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Any info on resetting emission control system on 1987 Mercedes 1987 420sel?

Here's the average emissions numbers for a 1987 Mercedes Benz 420sel.
31 HC (PPM) 0.10 Co (%) 237 NO (PPM) @ 15 MPH
These are my numbers
161 HC (PPM) 0.12 CO (%) 469 NO (PPM) @ 15 MPH

Is there anything I can do to lower my numbers to pass a smog test without spending alot of cash

2007-03-18 09:26:00 · 2 answers · asked by Anonymous in Cars & Transportation ➔ Car Makes ➔ Mercedes-Benz

2 answers

Sounds like either an oxygen sensor or cat problem.

2007-03-18 11:10:44 · answer #1 · answered by anywherebuttexas 6 · 1⤊ 0⤋

Yeah, it 's the o2 sensor at best. The # are to high for anything in a can that can lower them, A fresh set of plugs and wires along with a cap and rotor wouldn't hurt. Try eBay for your parts.

2007-03-18 13:20:10 · answer #2 · answered by Boston Mark 5 · 0⤊ 0⤋