my car it need a egr valve and my car dont reach the exceleratin on 1999 Mercedes-Benz E320

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Asked by for the 1999 Mercedes-Benz E320
I am not sure of your question. The EGR valve "recycles" exhaust gasses into the engine, by doing so it reduces NOx and other pollutants. A failed EGR can cause a lean misfire and or higher emission output, and possible "pinging" on acceleration.