PO446 - check engine light on - Mercedes-Benz Forum

 
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post #1 of 1 (permalink) Old 02-23-2010, 12:49 PM Thread Starter
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Wink PO446 - check engine light on

Urg, my check engine light came on so I went and used a diagnostic tool from the auto store, I have PO446 on my 2005 ml350, which has 32k miles. It seems as though the gas cap might have been bad so I replaced it a few days ago, light is still on however I've only driven about 40miles since the gas cap, will it go off itself or should I get the diagnostic tool to turn it off? I would rather see if it will go off itself, any ideas when it should go off? thanks
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