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 C257 - CLS Coupe CLS450

C257 - CLS Coupe CLS450 (Air Body Control Optional)

CLASS E (W 210) 420 (HP: 279 | Year: 96 > 98)

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

600 RPM Crank Performance Numbers are calculated with a 14% Drivetrain loss on RWD vehicles

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

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 C257 - CLS Coupe CLS450Intermediate 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