RENNtech ECU+ Upgrade | X253 | GLC63 AMG (S) 4MATIC+ SUV | 601 HP/644LB-FT | 4.0L V8 BiTurbo | M177 | MY2016+ porsche-911--992---2018-present--targa-4-gts-esr1386299 E53 AMG Sedan | MY2019+

E53 AMG Sedan | MY2019+ | *Needs to be equipped with optional performance exhaust/factory valves*

Software updates do not interfere with the functionality of the EVM

500 HP @ 6800 RPM

up to an astonishing 582 HP and 752 lb/ft at the crank

Our proprietary ECU upgrade for the Mercedes M133 engine offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability

RENNtech ECU+ Upgrade | X253 | GLC63 AMG (S) 4MATIC+ SUV | 601 HP/644LB-FT | 4.0L V8 BiTurbo | M177 | MY2016+ porsche-911--992---2018-present--targa-4-gts-esr1386299 E53 AMG Sedan | MY2019+ECU+ Upgrade GLC 63 AMG S and non S Up to 601 HP 644 LB FT Gains: +75 HP & +113 LB 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