How to Fix Check Engine Light, Fix code P0400, Clean EGR valve on Mercedes ML500 ( W164)

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How to Fix Check Engine Light, Fix code P0400, Clean EGR valve on Mercedes ML500 (W164) in Easy Steps. Things you need: Tools Ratchet set Pliers B12 CChemtool, Carburetor Choke Throttle Body Cleaner Rubber Pipes actron CP9125, OBD II PocketScan Thanks for watching, Enjoy, and please don t forget to: LIKE, COMMENT, FAVORITE, SHARE and SUBSCRIBE. Please SUBSCRIBE, If you haven t done so yet, take a look around. If you like what you see be sure to Subscribe to be notified when new content is posted.