You need to contact a tuner. You'll buy the software and they'll tune the car for you. Do this after you're done with your mods to save on costs.
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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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