Weistec Engineering – Mercedes-Benz M139 43 ECU Tune – C43 AMG / GLC43 AMG / SL43 AMG

Description

Weistec Engineering ECU tune for the Mercedes-Benz C43 AMG, GLC43 AMG and SL43 AMG (2022-2026) with the Turbocharged 2L I4 (M139). Weistec’s crank figures put the tuned engine at 510 hp and 490 lb-ft, up from 416 hp and 369 lb-ft stock, from a recalibration of the factory ECU software.

Key Features:

• Up to +94 hp / +121 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 9 Speed TCU Tune (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 Pro Dealer: installed through a certified Weistec Cypher Pro dealer.

Fitment:

• Mercedes-Benz C43 AMG 2022-2026 (W206) – Turbocharged 2L I4 (M139)
• Mercedes-Benz GLC43 AMG 2023-2026 (X254 / C254) – Turbocharged 2L I4 (M139)
• Mercedes-Benz SL43 AMG 2022-2026 (R232) – 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.