Cedar PerformanceECU / DME tuning
Photographed Cedar Performance workstation with the bench-patch tool used for OBD unlock service

C257 / MRG1 / MRD1 / MRD1.40 / MRD1.41 / MRD1.42 / MRD1.48 / MRD1.76 / MRD1.77 / MRD1.81

Mercedes CLS OBD Unlock Patch

ECU access only. Performance tuning is sold separately.

View unlock servicesBrowse Mercedes
Model years2018-2026
ECU identifiersMRG1 / MRD1 / MRD1.40 / MRD1.41 / MRD1.42 / MRD1.48 / MRD1.76 / MRD1.77 / MRD1.81
PlatformC257
ServiceRequest OBD unlock patch

Mercedes CLS OBD unlock patches

2026 Mercedes CLS C257 ECU OBD Unlock Patch

MRG1 / MRD1 / MRD1.40 / MRD1.41 / MRD1.42 / MRD1.48 / MRD1.76 / MRD1.77 / MRD1.81 / C257 · AutoTuner Bench Patch

$200 View unlock service

2025 Mercedes CLS C257 ECU OBD Unlock Patch

MRG1 / MRD1 / MRD1.40 / MRD1.41 / MRD1.42 / MRD1.48 / MRD1.76 / MRD1.77 / MRD1.81 / C257 · AutoTuner Bench Patch

$200 View unlock service

2024 Mercedes CLS C257 ECU OBD Unlock Patch

MRG1 / MRD1 / MRD1.40 / MRD1.41 / MRD1.42 / MRD1.48 / MRD1.76 / MRD1.77 / MRD1.81 / C257 · AutoTuner Bench Patch

$200 View unlock service

2023 Mercedes CLS C257 ECU OBD Unlock Patch

MRG1 / MRD1 / MRD1.40 / MRD1.41 / MRD1.42 / MRD1.48 / MRD1.76 / MRD1.77 / MRD1.81 / C257 · AutoTuner Bench Patch

$200 View unlock service

2022 Mercedes CLS C257 ECU OBD Unlock Patch

MRG1 / MRD1 / MRD1.40 / MRD1.41 / MRD1.42 / MRD1.48 / MRD1.76 / MRD1.77 / MRD1.81 / C257 · AutoTuner Bench Patch

$200 View unlock service

2021 Mercedes CLS C257 ECU OBD Unlock Patch

MRG1 / MRD1 / MRD1.40 / MRD1.41 / MRD1.42 / MRD1.48 / MRD1.76 / MRD1.77 / MRD1.81 / C257 · AutoTuner Bench Patch

$200 View unlock service

2020 Mercedes CLS C257 ECU OBD Unlock Patch

MRG1 / MRD1 / MRD1.40 / MRD1.41 / MRD1.42 / MRD1.48 / MRD1.76 / MRD1.77 / MRD1.81 / C257 · AutoTuner Bench Patch

$200 View unlock service

2019 Mercedes CLS C257 ECU OBD Unlock Patch

MRG1 / MRD1 / MRD1.40 / MRD1.41 / MRD1.42 / MRD1.48 / MRD1.76 / MRD1.77 / MRD1.81 / C257 · AutoTuner Bench Patch

$200 View unlock service

2018 Mercedes CLS C257 ECU OBD Unlock Patch

MRG1 / MRD1 / MRD1.40 / MRD1.41 / MRD1.42 / MRD1.48 / MRD1.76 / MRD1.77 / MRD1.81 / C257 · AutoTuner Bench Patch

$200 View unlock service

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