RENNtech Intermediate ECU Upgrade | C216 | CL 63 AMG | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2011-14 porsche-panamera--971---2016-2024--turbo-s-sport-turismo-esr8018897 ): 603 HP @ 5

):                        603 HP @ 5

The RENNtech Hand-Held Suspension Module (HSM) is designed to work with the Mercedes Airmatic Suspension

CLK CABRIOLET (A 209) 500 V8 automatic [2 Filters Required] (HP: 306 | Year: 03 > 06)

fall off or fade when mounted to the exterior of their vehicle after six months or while driving at high speed

RENNtech Intermediate ECU Upgrade | C216 | CL 63 AMG | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2011-14 porsche-panamera--971---2016-2024--turbo-s-sport-turismo-esr8018897 ): 603 HP @ 5Intermediate ECU Upgrade Up to 638HP 695TQ Gains: +75HP +101TQ RENNtech M157 Biturbo ECU Upgrades are TV approved! Our intermediate level ECU upgrade for the Mercedes M157 engine still offers huge gains in performance across the entire RPM range, but with a slightly reduced peak HP and torque from our standard tune. This is ideal for customers who want increased performance in their daily driver without worry of extra strain on driveline components or