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1992 Mercedes-Benz 400SE Question: how to test or check smog pump (air injection pump)?



palrepair, Gary, IN, October 13, 2010, 13:38

failed emission test,clucth does not appear to be working

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    Auburn Foreign & Domestic (194 Answers) , Auburn, WA - (253) 259-3676
    Greg-Julia October 13, 2010, 19:30

    Pump should have power when 1st started cold. If not check for faulty relay or damaged wires. Mercedes has had issues with the insulation falling off the wiring. Good luck!

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