CLS53 Tune — Stage 1

AMR Performance develops CLS53 software as 2 separate files, not one calibration reused across a range. These cover the CLS (C257) chassis, each written for that car's engine and gearbox combination. The list includes ECU calibrations and transmission (TCU) software, which can be run individually or together. Installation is comport pro -or- dealer flash or ecu ship-in -or- dealer flash. All current files are built for 91/93 Octane pump fuel — no race fuel and no hardware changes required. Every calibration listed here ships as a Stage 1 tune; the power figures for each are on its own product page.