M156 ECU Tune

The Weistec Engineering M156 ECU Tune is a sophisticated performance upgrade for naturally aspirated M156/M159 engines. Developed by a leader in tuning and calibration, this module leverages the same technology used in Weistec's Supercharger Systems to deliver a significant increase in horsepower and torque. This ECU tune is a reflash of your original ECU and is street legal across all US states, holding CARB EO# D-691-3. The tune is available in two stages: W.1 for stock vehicles and W.2 for vehicles equipped with race exhaust. Optional accessories can be added, including the Cypher Classic Handheld Programmer, High Flow Air Filters, one-step colder spark plugs, and a 7-speed TCU tune for pre-2019 models. Note that the Cypher handheld programmer is not compatible with 2020+ models. The Weistec M156 ECU Tune is specifically designed for the M156 engine family and is compatible with various Mercedes-Benz models including the SL63 AMG (R230), R63 AMG (W251), and ML63 AMG (W164) from model years 2007 through 2011. Customers purchasing this ECU upgrade receive credit towards a future Weistec M156 Supercharger System purchase.