I have hiccups/ studder in my engine during acceleration I changed plugs and coils same issue. So I graphed my MAf sensor and saw a steady climb and then a couple of dips in the graph when it studderd. I’m pretty sure it’s a failing mass air flow sensor. Any ideas?
2010 ml350 base

 

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I unplugged the MAf sensor and ran better so I cleaned the MAf sensor and smooth as silk acceleration. So I ordered a bosh replacement.a failing MAF sometimes don’t trigger the check engine light. Good luck.