Boosted up the power of this Mercedes CLS63 with our VR Tuned ECU Flash via the OBDII port using the Dimsport MyGenius tool. The 6.218L AMG engine is a beast as found in the C63 and E63 vehicles. In the sleak CLS sedan it puts out a strong 514 horsepower stock. With the ECU flash, the car becomes much more responsive and improves leaps and bounds over stock. 36 hp and 30 ft/lbs of torque is gained over stock making this almost as powerful as the 4.7L Bi-Turbo C218 CLS63. Get your Mercedes CLS63 ECU Flash Here Leave a Reply Cancel ReplyYou must be logged in to post a comment.