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1993 Mercedes-Benz 500SL

Question: Failed Emission Test (96 S500 MB)

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Charles Y., Reston, VA, October 12, 2009, 11:01
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96 S500. Failed emission test. Changed the O2 sensor, however, mechanic said I need to drive the cay 100 miles for the system to reset. I did and went back for retesting, mechanic said the car is still not ready and I need to drive the car for a few more days. How long does this take? and is there a way to manually getting the system to sync?

Thanks much!
charles

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  • Answer #1

    Wilsonite October 12, 2009, 13:45
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     Journeyman

    It depends, based on my vehicle, last time I cleared the codes it took over a week of driving (50-60mi/day) to get the statuses to show ok rather than incomplete.

    It is a function of run time per startup - and number of start/warmup cycles.

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    Charles Y., October 12, 2009, 14:12
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     Rookie

    Thanks you. This is very helpful. I guess I just have to keep checking back...

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