CEL on sporadically in C320 Wagon - Mercedes-Benz Forum

 
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post #1 of 6 (permalink) Old 06-29-2014, 10:12 AM Thread Starter
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CEL on sporadically in C320 Wagon

Hello everyone,

I drive a 2004 C320 wagon that lately has been driving me!

Seven days ago, I failed to tighten the fuel cap on after filling up. I got the customary warning light on my dash with a flashing of the fuel gauge light. Once I realized what the problem was, I tightened the cap and all was well.

Three days later, however, the CEL came on briefly. I tightened the cap and it went off. Three days after that, however, the big trouble happened. After filling the tank, the CEL came on again, with a sputtering of the engine that wouldn't turn over. I had it towed the 150 miles from home, even though it ran normally after a few minutes. It is running normally now, with no CEL on (which is why auto zone can't give me a code).

Any insight into the problem?
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post #2 of 6 (permalink) Old 06-29-2014, 01:43 PM
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There are stored codes, pending codes and current codes. I am surprised it did not show up in the stored codes so there is a reference of what might have happened.
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post #3 of 6 (permalink) Old 06-29-2014, 04:01 PM
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Spending $29 on scanner could prevent you from 150 miles towing.

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post #4 of 6 (permalink) Old 07-09-2014, 09:44 PM Thread Starter
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Turned out to be a crankshaft position sensor, which is quite common from what I understand.
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post #5 of 6 (permalink) Old 07-09-2014, 10:19 PM
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Originally Posted by Missykins View Post
Turned out to be a crankshaft position sensor, which is quite common from what I understand.
I am coming late to the party, but that would have been my guess.

You were fooled/distracted by the earlier fuel cap issue.

If you want to stay a little more on top of things with your car, the MS309 scanner is about $20 on Amazon, it's a great little tool.

Good luck.

Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy; its inherent virtue is the equal sharing of misery. (Winston Churchill)
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post #6 of 6 (permalink) Old 07-10-2014, 06:14 AM Thread Starter
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You're right! Thanks for the information.
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