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 1 at 3220 rpm 319

1 at 3220 rpm 319

Our intermediate ECU tune increases performance from 556 HP and 550 lb/ft torque to 624 HP and 680 lb/ft at the crank

Dyno measured by RENNtech:  545 HP @ 6

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

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 1 at 3220 rpm 319RENNtech 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