Weistec Engineering – Mercedes-Benz M278 ECU Tune

Description

Weistec Engineering ECU tune for the M278-powered Mercedes-Benz models (2011-2020) with the Twin Turbo 4.7L V8 (M278). Weistec’s crank figures put the tuned engine at 540 hp and 715 lb-ft, up from 429 hp and 443 lb-ft stock, from a recalibration of the factory ECU software.

Key Features:

• Up to +111 hp / +272 lb-ft: Weistec’s crank estimate of 540 hp and 715 lb-ft, from Dynojet testing; real gains depend on fuel, conditions and supporting modifications.
• CARB EO D-691-1: W.1 is CARB-exempt and street legal in all 50 US states; W.2 is for competition use.
• Stage calibrations: W.1 (Stock Vehicle) and W.2 (Race Exhaust fitted), so the calibration matches the hardware on your car.
• Optional add-ons: 7 Speed TCU Tune (Pre-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.

Fitment:

• Mercedes-Benz CL500 2011-2014 (C216) – Twin Turbo 4.7L V8 (M278)
• Mercedes-Benz CL550 2011-2014 (C216) – Twin Turbo 4.7L V8 (M278)
• Mercedes-Benz CLS500 2011-2018 (C218 / X218) – Twin Turbo 4.7L V8 (M278)
• Mercedes-Benz CLS550 2012-2018 (C218) – Twin Turbo 4.7L V8 (M278)
• Mercedes-Benz E500 2012-2016 (W212 / S212 / C207 / A207) – Twin Turbo 4.7L V8 (M278)
• Mercedes-Benz E550 2012-2017 (W212 / C207 / A207) – Twin Turbo 4.7L V8 (M278)
• Mercedes-Benz GL450 2013-2014 (X166) – Twin Turbo 4.7L V8 (M278)
• Mercedes-Benz GL500 2013-2015 (X166) – Twin Turbo 4.7L V8 (M278)
• Mercedes-Benz GL550 2013-2015 (X166) – Twin Turbo 4.7L V8 (M278)
• Mercedes-Benz GLE500 2016-2020 (W166) – Twin Turbo 4.7L V8 (M278)
• Mercedes-Benz GLE550 2016-2020 (W166 / C292) – Twin Turbo 4.7L V8 (M278)
• Mercedes-Benz GLS500 2015-2019 (X166) – Twin Turbo 4.7L V8 (M278)
• Mercedes-Benz GLS550 2017-2019 (X166) – Twin Turbo 4.7L V8 (M278)
• Mercedes-Benz ML500 2012-2015 (W166) – Twin Turbo 4.7L V8 (M278)
• Mercedes-Benz ML550 2012-2015 (W166) – Twin Turbo 4.7L V8 (M278)
• Mercedes-Benz S500 2011-2017 (W221 / W222) – Twin Turbo 4.7L V8 (M278)
• Mercedes-Benz S550 2012-2017 (W221 / W222 / C217) – Twin Turbo 4.7L V8 (M278)
• Mercedes-Benz SL500 2012-2020 (R231) – Twin Turbo 4.7L V8 (M278)
• Mercedes-Benz SL550 2012-2020 (R231) – Twin Turbo 4.7L V8 (M278)

Talk to us before ordering to confirm the right stage and tuning method for your car.