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Originally Posted by MrCjames
Your vehicle should be fitted with an LED in the diagnostic harness located on the right hand side of the engine compartment. This provides some limited information regarding the engine MIL (Malfunction Indicator Lamp). Press and hold the button for 3 seconds then release, count the blinks-pause for 5 seconds after each code and repeat the process until the codes are repeated.
We can provide you with some insight once we have an idea of the codes that are stored in that particular system , I believe it is the DM (Diagnostic Module).  |
I don't believe that any of the C-class sedans (w202s) had that particular diagnostic module. It was limited to the w201, w124, w126 (some, not all) and r129 (very early) models. The w202 had OBDII data connectors...you can take it to Autozone and they should be able to read the code(s) for you (free).