DYNO Test and RENNtech Shop Tour! Mercedes Benz CLS 550 M278 ECU Tune (W218 C218)
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Grand Prix Originals USA! Use coupon code AEROMOTIVE for discounts. https://www.grandprixoriginalsusa.com/ RENNtech M278 (550) ECU Tune Data Page https://www.renntechmercedes.com/index.php/products/mb/cls-class/cls-218-2011-2014/cls-550-biturbo/rt-ecu-plus-218-cls550-detail Naturally this tune is available for any M278 (4.7 L V8 Twin-Turbo). Appl...
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