Weistec Engineering – Mercedes-Benz M139 ECU Tune

Description

Weistec Engineering ECU tune for the M139-powered Mercedes-Benz models (2019-2024) with the Turbocharged 2L I4 (M139). Weistec’s crank figures put the tuned engine at 510 hp and 490 lb-ft, up from 385 hp and 331 lb-ft stock, from a recalibration of the factory ECU software.

Key Features:

• Up to +125 hp / +159 lb-ft: Weistec’s crank estimate of 510 hp and 490 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+) and 8G DCT TCU Tune, 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 Pro Dealer: installed through a certified Weistec Cypher Pro dealer.

Fitment:

• Mercedes-Benz A45 AMG 2019-2024 (W177) – Turbocharged 2L I4 (M139)
• Mercedes-Benz A45 AMG S 2019-2024 (W177) – Turbocharged 2L I4 (M139)
• Mercedes-Benz CLA45 AMG 2019-2023 (C118 / X118) – Turbocharged 2L I4 (M139)
• Mercedes-Benz CLA45 AMG S 2019-2023 (C118 / X118) – Turbocharged 2L I4 (M139)
• Mercedes-Benz GLA45 AMG 2021-2023 (H247) – Turbocharged 2L I4 (M139)
• Mercedes-Benz GLA45 AMG S 2021-2023 (H247) – Turbocharged 2L I4 (M139)

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.