RENNtech ECU+ Upgrade | C190 | AMG GT S | 601HP/582LB-FT | 4.0L V8 BiTurbo | M178 | MY2015-2017 mercedes-benz-sl-class--231---2012-2016--sl-400-biturbo-esr7262269 Lowering Range: up to 1

Lowering Range: up to 1

RENNtech M137 V12 ECU Upgrades are TÜV approved

Power gains are calculated based on the peak stock performance measured by RENNtech

After plugging the HSM into the OBD2 port

RENNtech ECU+ Upgrade | C190 | AMG GT S | 601HP/582LB-FT | 4.0L V8 BiTurbo | M178 | MY2015-2017 mercedes-benz-sl-class--231---2012-2016--sl-400-biturbo-esr7262269 Lowering Range: up to 1ECU+ Upgrade Up to 601HP 582LB FT Gains: +65HP & +87LB FT RENNtech tuning products are certified to meet CARB standards in all 50 States. RENNtech HHT (hand held tuner) allows you the unlimited ability to switch between tuned and stock ECU programming and requires no ECU removal! Our proprietary tuning module stores both the RENNtech tuned file and your vehicles stock file. The module plugs directly into the OBD2 port and delivers the file you choose