Fault-code deactivation during the flash: the D-Sync app lists the fault codes of the car's exact calibration; tick the ones a modified setup keeps throwing and they are written into the calibration with the flash, so the ECU stops reporting them — no repeated clearing, no add-on modules. Works with OTS tunes and firmware flashes; a calibration that is not covered yet is flagged before anything is written. Download the car's DTC module in the app's Files, pick the codes, confirm and flash; the factory calibration stays saved for a one-tap revert. Intended for closed-course use; vehicles on public roads must comply with local emissions regulations; complying with local emissions and roadworthiness rules is the owner's responsibility.
ECU diagnostics: read and clear active and stored engine fault codes, with freeze frame and extended data where the ECU provides them, matched against the Mercedes-Benz engineering fault database in English and Chinese (German engineering wording where available); the whole database can be browsed, sorted by the factory module hierarchy. Supports the engine ECUs of the M133, M157, M176, M177, M178, M256 Gen 1 (MG1), M276, M277, M278 and M279.
DTC management and the Exhaust Burble Tuner are included with every OTS Mappack. Tune catalog · Pop & Bang Tuner · All supported cars