Mercedes-Benz CLS (C257) Performance Tuning — TCU TUNING | AMR Performance

Mercedes-Benz CLS (C257) performance tuning The Mercedes-Benz CLS (C257) responds exceptionally well to professional calibration. From the factory it leaves meaningful power and torque on the table for emissions and warranty reasons — AMR Performance tcu tuning upgrades recover that headroom with stronger mid-range pull, sharper response, and refined daily drivability. Every AMR calibration for the CLS (C257) is emissions-conscious, developed to keep your car healthy, and backed by direct support. Fitment covers Mercedes-Benz CLS (C257) model years 2019–2024. What's included Custom calibration developed specifically for the Mercedes-Benz CLS (C257) Optional TCU transmission tuning for firmer, faster shifts 91 and 93 octane map options to match your fuel Improved throttle response and reduced turbo lag Retains factory knock protection and safety limits 100% reversible to stock 1-on-1 setup and support from the AMR team