RENNtech | ECU Upgrade | X204 | GLK 350 BlueEFFICIENCY | 308HP/285LB-FT| 3.5L V6 NaturallyAspirated | M276 mercedes-benz-g-class--463---1990-2018--g-500-esr8550205 RENNtech M157 Biturbo ECU Upgrades

RENNtech M157 Biturbo ECU Upgrades are TÜV approved

1 at 5510 rpm 311

S63 AMG 4MATIC+ (MY2018+ | W222 | M177 | 4

The RENNtech Lower Control Arm give the best improvment in combinatino with the RENNtech Toe Link Kit

544 LB-FT @2

RENNtech | ECU Upgrade | X204 | GLK 350 BlueEFFICIENCY | 308HP/285LB-FT| 3.5L V6 NaturallyAspirated | M276 mercedes-benz-g-class--463---1990-2018--g-500-esr8550205 RENNtech M157 Biturbo ECU UpgradesRENNtech ECU Upgrade for 204 GLK 350 Blue Efficiency. Up to 308HP and 285LB FT. Gains: +6HP & 12LB FT RENNtech has been at the forefront of ECU tuning since electronic engine management started to show up in vehicles during the mid 1980's! Our experience, countless hours of in house research, development and exhaustive testing ensure that our proprietary ECU upgrade offers incredible performance gains and rock solid daily driver reliability. RENNtechs