It used to be a bulletproof motor, but the tune they started running in 2007+ was crippled by the EPA. They had to get emissions down, so they leaned it out on spoolup. Good for emissions, bad for everything else. If one were to reflash the car in the dealer parking lot on delivery, I'll bet you'd never have a problem.
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2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent
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