RENNtech ECU+ Upgrade | W205 | C 43 AMG | Sedan | 416 HP / 460 LB-FT | M276 | 3.0L V6 BiTurbo | MY2017-2021 mclaren-slr-sls-class--197---2011-2014--amg-esr2440417 No drilling or modifications to

No drilling or modifications to the trunk are necessary

Any parts with more noticeable areas of concern are scraped entirely and never offered to our highly discerning clientele

development and long-term testing ensure that our ECU upgrade offers the best in quality

To reach the maximum power level

GL 450 BiTurbo (X166 - M276 Biturbo 4-MATIC Engine) Stock Performance:

RENNtech ECU+ Upgrade | W205 | C 43 AMG | Sedan | 416 HP / 460 LB-FT | M276 | 3.0L V6 BiTurbo | MY2017-2021 mclaren-slr-sls-class--197---2011-2014--amg-esr2440417 No drilling or modifications toThe RENNtech ECU Plus Upgrade brings the C 43 AMG Sedan up to 416 HP and 460 LB FT Gains: +41 HP and +62 LB 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.