M-Class (W164) Produced 2006-2011: ML280CDI, ML320CDI, ML420CDI, ML350, ML500, ML550

2007 ML500 Check Engine Light

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Old 06-07-2012, 04:47 PM
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2008 S550
2007 ML500 Check Engine Light

The Wife's 2007 ML500 Check engine light just came on.. Any idea what that might be or what it will cost to fix?
Old 06-07-2012, 07:26 PM
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Not until you pull the diagnostic codes and post them here. It could be anything from a gas tank cap open to impending doom.
Old 06-08-2012, 09:31 AM
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The CEL should have a two phase warning, one like you have showing and when things really go bad just a row of $$$$.

But like said above, if you don't have a message in the digital screen telling you to take it to service it's probably minor.

Mark
Old 06-08-2012, 11:28 AM
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Turned out to be the gas cap.. I tightened it when I got home and the light went out.

what do you guys use to pull codes?
Old 06-08-2012, 08:10 PM
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Do an internet search for "OBD11 code reader".
Or if you live in the US, several auto parts stores do it for free. But I must say the dealer or a specialized MB shop can also help.
Glad to hear it was my first guess.

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