Mercedes CLS550 with VRTuned ECU Flash Gains 8mph in the 1/4 Mile

3a83dc2a_d54b_41a7_926b_bdd66d371979_4b9ca11ea2beac78df6e3c569ead9f8941a3773bNot a huge amount of enthusiasts realize just how tuner friendly Mercedes’ engines can be. When you think of performance, you probably don’t think of the CLS550 4Matic, one of Mercedes’ largest cars. One of our recent customers, however, showed us how much performance was gained after they came in for a simple ECU Flash ...