RENNtech Intermediate ECU Upgrade | X253 | GLC63 AMG (S) 4MATIC+ SUV | 574 HP/612LB-FT | 4.0L V8 BiTurbo | M177 | MY2016-2022 bentley-flying-spur-speed--2022-2024--6-0l-w12-tsi-esr8340154 especially in the most-used middle

especially in the most-used middle range

215 - CL 600

Stage II Turbo Upgrade

The DLM requires no splicing or soldering to the factory wiring harness

CLASS E (W 211) 280 V6 4-matic [2 Filters Required] (HP: 231 | Year: 05 > 09)

RENNtech Intermediate ECU Upgrade | X253 | GLC63 AMG (S) 4MATIC+ SUV | 574 HP/612LB-FT | 4.0L V8 BiTurbo | M177 | MY2016-2022 bentley-flying-spur-speed--2022-2024--6-0l-w12-tsi-esr8340154 especially in the most-used middleIntermediate ECU Upgrade GLC 63 AMG S and non S Up to 574 HP 612 LB FT Gains: +48 HP & +80 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