Symptoms of a bad EGR valve (Rough Idle, Shaking, Engine Misfire)

These are the symptoms you may experience if your car/truck has a faulty or malfunctioning EGR valve. Shown on a 2005 Mercedes CLK 320
EGR valve = Exhaust Gas Recirculation valve
Symptoms include a rough idle, rough idling, engine misfire, car shaking, knocking sound in engine, bumping sound in engine
In my case, turning on the AC on full helped decrease the car shaking


























Extratags, ignore:
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