Some months ago, I noticed that my C Class 200 CDI 2010 was consuming too much diesel than expected and now it just start bringing out black smoke from the exhaust and making serious noise in the engine, this worries me a lot because of the mechanics I visited has a solution for me, they keep saying different things, the truth is that in my country we really don't buy exotic diesel cars and that's why is difficult to find a good diesel mechanics. I will really appreciate if somewhere can help me out. Thanks