ECU Upgrade C117 CLA 45 AMG 2.0L M133

The RENNtech ECU Upgrade is a sophisticated hand-held tuning solution specifically engineered for the 2014-2019 Mercedes-Benz CLA 45 AMG (C117) equipped with the 2.0L M133 turbocharged engine. By utilizing a proprietary tuning module that plugs directly into the OBD2 port, this system allows owners to switch between custom RENNtech performance files and stock engine mapping at will. This upgrade optimizes critical engine parameters, including ignition timing, air-to-fuel ratios, boost mapping, and rev limiters. These adjustments allow the M133 engine to achieve significantly higher power levels across the entire RPM range without compromising daily driver reliability. RENNtech's software is TÜV approved, reflecting extensive in-house research, development, and rigorous testing. The system is intended for the C117 chassis with the M133 engine. It is important to note that crank performance figures are calculated based on an 18% drivetrain loss for 4MATIC models. Users should be aware that the system is specific to the M133 powertrain configurations and is not compatible with other Mercedes engine types or platforms not explicitly listed.