RENNtech | ECU Upgrade | R172 | SLK 350 BlueEFFICIENCY | 308HP/285LB-FT | 3.5L V6 NaturallyAspirated | M276 sprinter-sprinter-van-2-1l-inline-4-diesel-esr3516206 Deep scratches and dents will

Deep scratches and dents will void the credit

By modifying boost mapping and keeping optimized air-to-fuel ratios

The tasteful exterior enhancements begin at the rear with a prepreg carbon fiber decklid spoiler

C218 - CLS550 MY2015-2017 (FaceLift)

RENNtech | ECU Upgrade | R172 | SLK 350 BlueEFFICIENCY | 308HP/285LB-FT | 3.5L V6 NaturallyAspirated | M276 sprinter-sprinter-van-2-1l-inline-4-diesel-esr3516206 Deep scratches and dents willRENNtech ECU Upgrade for 172 SLK 350 BlueEFFICIENCY. 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. RENNtech