C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

Looking for ECU wiring diagram for Check Engine light on 2006 C@30 (W203)

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Old Sep 20, 2020 | 01:09 AM
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khalidnz's Avatar
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2007 CLS 350 Mercedes and 2006 C230
Smile Looking for ECU wiring diagram for Check Engine light on 2006 C@30 (W203)

Hi
i own an 2006 C230 Mercedes (W203). I have an issue where my engine check warning light is not displaying. I found this out when I had an issue with my O2 sensor causing me issues which showed up on my scanner but there was not warning light showing. That was some time ago now and the car is running fine now (finger crossed I will have not more issues). However. I want to get the warning light displaying again, as this is a visual indication of any fault when they occur as a prompt to look further. At the moment i have to just check every couple of months with a small OBD2 scanner to see if there are any faults logged.
What i am looking for is a electronic schematic diagram for the ECU and in particular the Engine Check Warning light circuit. If I can get me hands on this i then do some electrical testes to make sure there are not broken or shorted wires (or bad connections in warning light circuit). Can anyone help with this request or information around the check engine like warning circuit and how it works on the this model Mercedes.

P.s. I am a automotive technician by trade so really just looking to get my hands on the schematics.

Regards
K
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Old Sep 25, 2020 | 04:22 PM
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Russell Ormerod's Avatar
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not a merc
why do you start a new thread with the same question? You have been told what need to be done 🤔
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