Uh oh! Your check engine light is on, and you have no idea what could be going on with your car. Come to this forum, explain the situation in the form of a request, and let one of our Professionals give you some preliminary diagnostics or even pull the codes for free before you even take your car to a shop. Or if you have a shop, use our "DTC" Diagnostic Trouble Codes data base from other mechanics around the world THAT ALREADY FIXED THOSE "DTC's" to save you time and money!


2010 MBZ GLK 350 4MATIC "DTC" CODE #1204


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