I wouldn't run two different types of tires like that. I get that you're trying to increase traction, but think about it. Now you've got much stickier rubber in the back than in the front. When you're driving fast and want to turn, now the front has much less grip than the rear. Either you end up with an understeering mess, or you fire yourself off the road because the rear hooks up and the front just slides. Replace all four for best results. Although, I still am absolutely 100% convinced that there is nothing wrong with your car or your tires.
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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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