UNLOCK // M256 // MG1CP002 // 43, 450, 53, 500
Mercedes MD1 / MG1 ECU Unlock
With our in-house ECU unlock for Mercedes and AMG 2020+ models equipped with MD1/MRD1 or MG1/MRG1 ECUs, you unlock the full potential for real ECU Tuning.
Forget about solutions like tuning boxes or piggy-back ECUs: our unlock provides the technical foundation for real software customization directly in the ECU.
✔ No interference with engine management via additional hardware
✔ Unlock remains active even after a manufacturer update
✔ Unlock process completed within 1–2 business days
✔ Flashing via OBD2-Port or OBD-Bench setup using our KM eFlash dongle or a J2534-compatible interface, e.g. Tactrix Openport 2.0/Scanmatic
✔ Automatic checksum correction during writing
✔ A KM Flash license is included with the unlock
Compatible with the M256 engine and MG1CP002 ECU.
Fits the following vehicles (list may be incomplete, all information provided without guarantee).
| Make | Model | Year |
|---|---|---|
| AMG | GT 43 (X290) | since 2018 |
| Mercedes | CLS 450 (C257) | since 2018 |
| Mercedes | E 450 (213/238) | since 2018 |
| Mercedes | GLE 450 (V167) | since 2018 |
| Mercedes | GLS 450 (X167) | since 2019 |
| Mercedes | S 450 (223) | since 2020 |
| AMG | GT 53 (X290) | since 2018 |
| Mercedes/AMG | CLS 53 (C257) | since 2018 |
| Mercedes/AMG | E 53 (213/238) | since 2018 |
| Mercedes/AMG | GLE 53 (167) | since 2019 |
| Mercedes | S 500 (223) | since 2020 |
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Please note: In very rare cases, the unlock may not be possible due to the software version on your ECU. Unfortunately, this can only be determined during the unlocking process. If this happens, you will receive a full refund for the unlock service – however, shipping costs are not refundable.
Flashing
After the unlock, you can flash the software to the ECU via OBD2-Port or OBD-Bench setup using the CAN-BUS.
You will need our KM eFlash dongle or a J2534-compatible interface, such as the Tactrix Openport 2.0 or Scanmatic.
The required Windows software and license will be provided free of charge as part of the unlock service.
Important Shipping Information
Please print out your order confirmation and include it in the package — this is the only way we can correctly assign your ECU to your order.
All shipping costs (both to and from us) are the responsibility of the customer.
You can select your preferred shipping option during the checkout process.
The following options are available:
- DHL Standard (insured up to €500)
- DHL Express (insured up to €999)
- Own shipping label – in this case, please include a fully completed label inside the package and select “Own Label” as the shipping method during checkout.
On-Site Service
Would you prefer to drop off your ECU in person? No problem! You’re welcome to bring the unit directly to us — we’ll complete the unlock as quickly as possible, and in most cases, you can take it back with you the same day.
Important: Please select “Pickup” as the shipping method during checkout. An appointment must be scheduled in advance to ensure a smooth process.
Rules and Conditions for ECU Unlock
- The offer is intended exclusively for business customers.
- The customer assumes full responsibility for the shipment while in transit. We do not accept liability for lost or damaged packages.
- Only original, unopened ECUs are accepted.
- Previously opened, tampered with, or modified ECUs will not be processed under any circumstances.
- If any manipulation is detected, or if the control unit has been previously opened, modified, or is not in its original condition, the unlock will not be performed. In such cases, no refund will be granted.
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