NO idle speed adjustment! However cleaning the throttle plate area with scotch-brite pad might help the idle speed to return to normal. To get rid of the check engine code(19) the modified LH ECU is the best fix.

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MERCEDES Benz Master Guild Technician (6 TIMES)
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190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
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