CLK-Class (W208) 1998-2002: CLK 200, CLK 230K, CLK 320, CLK 430 [Coupes & Cabriolets]

Check engine light came on.

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Old Aug 1, 2003 | 05:07 PM
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cl_kruisin's Avatar
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From: WA
2000 CLK430 & 2000 Expedition on 22's
Check engine light came on.

Today, while I was driving my 430, I noticed the check engine light was on. It's running fine, was just serviced. Any suggestions?

Thanks
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Old Aug 1, 2003 | 05:23 PM
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khans's Avatar
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is your gas cap on properly?
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Old Aug 1, 2003 | 06:39 PM
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Brian_I.'s Avatar
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w211 & w124
Definitely check the gas cap first. I had the same problem and it was my O2 sensors, the two that come after the Cat. converter, replaced under warranty, whew.
I also bought an OBDII tester and figured out the problem for myself. That way I'd know if the dealership tries to me.

I have the tester if you want to borrow it, although I live in LA.
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Old Aug 2, 2003 | 02:28 AM
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W213 '17 E43 ///AMG - W211, W208 no more
Originally posted by khans
is your gas cap on properly?
yeah, I'd check the gas cap first... and if it seems to have been not tight... retighten it and after a few starts, the light should go off if that is the problem.

other than that, the only option is to take it to the dealer unless you want to tinker with it and try and fix yourself. in which case, you would need to be like brian and get an OBDII tester to find the fault and repair it yourself...
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Old Aug 4, 2003 | 01:52 AM
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cl_kruisin's Avatar
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2000 CLK430 & 2000 Expedition on 22's
I checked the gas cap and unfortunately that was not the problem. Are there any other simple things that might cause the check engine light to come on? If not, I'll just take it to the dealer and get it warranteed, I need new dash lights anyways
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Old Aug 4, 2003 | 08:00 AM
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2003 E55
I bet it's the O2 sensor, I had the same problem last month, replaced under warranty. Yesterday, my fuel gauge doesn't work, guess I need to visit my dealer, AGAIN....
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Old Aug 9, 2003 | 12:08 AM
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99 CLK 320
Mine came on just before I bought it. Had seller take to the dealer. "Faulty air valve sensor." $400 parts and labor.
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Old Aug 9, 2003 | 01:00 PM
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2000 CLK430 & 2000 Expedition on 22's
Well after I adjusted the gas cap, the light went off two days later.
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Old Aug 10, 2003 | 03:10 AM
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Originally posted by cl_kruisin
Well after I adjusted the gas cap, the light went off two days later.
i knew it... glad to see that it was nothing serious
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Old Aug 12, 2003 | 01:30 AM
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2000 CLK430
filling it up with too much gas will also cause it to happen.
it happened to me and i freaked.
16.4 is the max capacity according to the tank content window.
if you top it off too much the amount will stay at 16.4 for about 20 miles. after you kill some gas from driving and the content goes away the light will turn off.
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