'95 E420. The check engine light is on and it runs very rough.I replaced the both the wiring harness and cap and rotors. Nothing changed. </P>


So I took to the dealer and theypulled a code 19 andadvised replacing engine control unit part number 0215457032 -they want $2500 for the part.</P>


If I replace the part I would like to do it myself. However I dn't know whereit is located and would appreciate any insight into where physically, as well as any futher suggestionsor advice on how to proceed.</P>


TIA! - David</P>


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