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

C257 - CLS Coupe CLS450 (Air Body Control Optional)

The RENNtech ECU Plus Upgrade brings the W166 - GLE 43 AMG SUV up to 416 HP and 460 LB-FT | Gains: +41 HP and +62 LB-FT

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

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