Description
Weistec Engineering ECU tune for the Mercedes-Benz C63 AMG S, C63 AMG, GLC63 AMG S and GLC63 AMG (2015-2023) with the Twin Turbo 4L V8 (M177). Weistec’s crank figures put the tuned engine at 605 hp and 624 lb-ft, up from 469 hp and 479 lb-ft stock, from a recalibration of the factory ECU software.
Key Features:
- Up to +136 hp / +145 lb-ft: Weistec’s crank estimate of 605 hp and 624 lb-ft, from Dynojet testing; real gains depend on fuel, conditions and supporting modifications.
- Stage calibrations: W.1 (Stock Vehicle) and W.2 (Race Exhaust fitted), so the calibration matches the hardware on your car.
- Optional add-ons: CPC Module (2019+), 9 Speed TCU Tune (2019+) and 7 Speed TCU Tune (Pre-2019), each selectable when you order.
- Reflash of the factory ECU: the original module is recalibrated rather than replaced with a stand-alone or piggyback unit.
- What changes: improved throttle response, optimized fuel and spark, increased boost and top speed limiter removed.
- Tuning method: Cypher Plus: flashed at home from your phone with a Weistec Cypher Plus.
Fitment:
- Mercedes-Benz C63 AMG 2015-2023 (W205 / S205 / C205 / A205) – Twin Turbo 4L V8 (M177)
- Mercedes-Benz C63 AMG S 2015-2023 (W205 / C205 / A205) – Twin Turbo 4L V8 (M177)
- Mercedes-Benz GLC63 AMG 2017-2021 (X253 / C253) – Twin Turbo 4L V8 (M177)
- Mercedes-Benz GLC63 AMG S 2017-2021 (X253 / C253) – Twin Turbo 4L V8 (M177)
Not legal for sale or use on pollution-controlled motor vehicles; intended for competition use. Talk to us before ordering to confirm the right stage and tuning method for your car.

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