RENNtech ECU Tune: 9 Month Review (M278 V8 Bi-Turbo 4.7 Liter CLS 550 W218 C218)

RENNtech ECU Hand Held Tuner M278 V8 4.7 Liter Bi-Turbo https://www.renntechmercedes.com/inde... GrandPrix Originals USA - Use Code “AEROMOTIVE” at checkout. https://www.grandprixoriginalsusa.com... NHRA 0-60 mph rules explained by Road & Track Magazine https://www.roadandtrack.com/car-cult... C218 2012-2017 CLS 550 Theoretical Top Speed ACTUALLY 184! https://www.automobile-catalog.com/ca... 40-80 mph pull times (other makes and models) NOTE: As the O.P. says, these times are based off zero - 100 mph times, so the cars in this list have already built inertia going in to their 40 - 80 mph times. I did mine from a static 40 mph, thus my time will be a little slower.   / large_compilation_of_4080_mph_acceleration...