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Emissions. W124 E320 failing NOx
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04-27-2010, 01:24 PM
lafooy
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Join Date: May 2007
Location: New Jersey
Posts: 95
even though you might not have a check engine light on, I would suggest testing your 02 sensor ... i remember seeing a test for it on this site somewhere
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1994 E320, 145,000 miles
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