E-Class (W124) 1984-1995: E 260, E 300, E 320, E 420, E 500 (Includes CE, T, TD models)

How do you Reset the ECU?

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Old Feb 28, 2009 | 07:46 PM
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300E-24 AMG
How do you Reset the ECU?

Hello everyone,

What is the procedure to reset the ECU on a 1991 Mercedes W124?

Thanks!!!

Regards,
David
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Old Mar 4, 2009 | 02:02 AM
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300E-24 AMG
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Old Mar 4, 2009 | 07:52 AM
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1993 E300 2.8l
You can try a cap discharge, remove positive battery cable and negative battery cable from battery, touch and hold the two together for at least 10 seconds. I know it works on vw's when a module starts doing wierd things, puts it back to basic settings.

Last edited by E3002.8; Mar 4, 2009 at 07:55 AM.
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Old Mar 4, 2009 | 09:00 AM
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I don't believe the ECU on a W124 is programmable.
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Old Mar 4, 2009 | 12:28 PM
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Then how do you put the light in the dash out after fixing what was wrong?

Thank you very much!
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Old Mar 4, 2009 | 12:29 PM
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Originally Posted by hayesperform
Then how do you put the light in the dash out after fixing what was wrong?

Thank you very much!
I believe there is a re-set tool.
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Old Mar 5, 2009 | 10:34 PM
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E 220 W124
see http://www.mercedesshop.com/shopforu...d.php?t=239846
http://www.mercedesshop.com/shopforu...d.php?t=107630
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