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Mercedes Benz GL320 with check engine lights and black smoke from time to time

(2008 Mercedes-Benz GL320 CDI)
in Maunabo, PR on November 10, 2011
GL 320 diesel
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Popular Answer
A scantool is required to retrieve codes stored in the computer of your car. The codes stored will indicate where the fault is. Without knowing what codes are stored it is impossible to know what's wrong.
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