First see what the tune looks like. Water/meth isn't a bad thing unless it's tuned with it to the ragged edge and then the tank goes dry. I had a good experience with it on another car, but it's another point of failure. if you just use it to make up for CA's crap gas, you'll likely be ok.
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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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