RENNtech | HHT | ECU Upgrade | SLS AMG | C197 | 593HP/495LB-FT | 6.3L V8 N/A | M159 mercedes-benz-glb-class--247---2020-present--glb-35-amg-esr9030634 Please note:

Please note:

clocking a quarter mile time of 10

Details upon request

RENNtech ECU Upgrade for 212 - E 400 BiTurbo 4-MATIC Coupé

curbs and steep driveways

RENNtech | HHT | ECU Upgrade | SLS AMG | C197 | 593HP/495LB-FT | 6.3L V8 N/A | M159 mercedes-benz-glb-class--247---2020-present--glb-35-amg-esr9030634 Please note:RENNtech HHT ECU Upgrade for 197 SLS AMG. Up to 593HP and 495LB FT. Gains: +30HP & +14LB FT 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 directly to the ECU. Programming takes only a