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Old 09-08-2001, 05:21 PM
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Lightbulb Check engine light-How to shut it off for free!

Check engine light came on at 75k for service. I just had the 60k service done when I bought the car with almost 68k so I do not need it. Manual and service bulletin says it needs to be reset at the dealer, bull dookie!

This supposably works for ALL vehicles, no matter what year or model. Disconnect the battery on both positive and negative sides. Touch the terminals together for at least a minute. I recommend a jumper wire so you know they are connected. Do NOT come in contact with the battery or anything else for that matter. Reconnect the terminals and viola! You will need to reset your radio code and adjust clock.

What if it is a REAL problem you ask? Then the light will return shortly once the problem is detected.

Happy motoring! :p
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Old 09-08-2001, 06:27 PM
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I don't think it's coming on to tell you that you need preventive maintenance. I expect that you can turn it off by disconnecting the battery for a minute or so, on most cars this will reset the light and it can't hurt anything.

As you say if there's a problem it will come back on. Sometimes something will "glitch", such as a O2 sensor and trap a code, then once the light is reset it won't come back on.

Good luck,
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Old 09-08-2001, 09:09 PM
Registered User
Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
The ONLY reason the 'check engine' lamp was invented was the EPA. They wanted cleaner air, so we got catalytic converters. Once they were in place, the car manufacturers needed a way to make sure these fragile converters were not damaged by a malfunction of the engine.

SO, the check engine light was adopted. This light will come on to protect ONLY 2 things...The catalyst and potential for too much pollution.

IF the engine dumps too much or too little fuel, it will overheat and melt the cat, (can cost big $$$).

IF the engine does not heat up quickly enough, there is a likelihood of too much emission output during the first run.....

Donnie Drummonds
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Old 09-08-2001, 09:32 PM
David C Klasse's Avatar
CheFrac is Back!
Join Date: Jan 2001
Location: Mission Hills in the City of San Diego
Posts: 2,352
Disconnect the battery, nothing else needs to be done! Just unplug it for 30 seconds or so, and it should reset.

BTW, nice car.... glad you got something good (rather, GREAT) out of that whole dealer crap (with the 560/TMU) you went through.
2006 E350 w/ 155k miles (Daily Driver)

1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)
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