Mercedes FBS4 ECU Virginizing / Renewal Service (2014+ Models)

Mercedes FBS4 ECU Virginizing / Renewal Service (2014+ Models)

$250.00

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Mercedes FBS4 ECU Virginizing

Used ECU Reset to Factory-Virgin State – Dealer Programmable After Service

This service is for 2014 and newer Mercedes-Benz vehicles equipped with the FBS4 immobilizer system.

We perform bench-level ECU virginizing (ECU renew) — a specialized procedure that resets a used ECU to a factory-virgin state, removing all vehicle-specific immobilizer and security data.

Once completed, the ECU becomes functionally identical to a brand-new ECU, allowing it to be programmed to your vehicle using Mercedes dealer equipment or any professional scan tool with online coding capability.

⚠️ Mercedes dealers do NOT virginize used ECUs.
They only program new or already-virgin ECUs.
This service makes a used ECU acceptable for dealer programming.

✅ What This Service Does

✔ Removes immobilizer, VIN, and donor vehicle data
✔ Resets ECU to factory-virgin / renewed state
✔ Makes used ECU programmable to your vehicle
✔ Enables programming with Xentry or dealer-level scan tools
✔ Ideal when original ECU is damaged, burnt, or flooded

🔄 Virginizing vs Cloning vs IMMO OFF (Clear Comparison)

ECU Virginizing / Renew (This Service)

✔ Used ECU reset to factory-virgin state
✔ Must be programmed after installation
✔ Dealer or professional scan tool required
✔ Best option when original ECU data cannot be recovered

ECU Cloning

✔ Copies original ECU data to replacement ECU
✔ Plug-and-play installation
✔ Requires original ECU to be readable

IMMO OFF (Last-Resort Option)

⚠️ Immobilizer disabled
⚠️ Reduced vehicle security
⚠️ Used only when no other solution is possible

🚗 When You Need This Service

  • You bought a used ECU

  • Dealer or locksmith says ECU is locked to another vehicle

  • Original ECU is unreadable, burnt, or water-damaged

  • Vehicle will not start due to FBS4 immobilizer lock

  • IMMO light flashing / key not accepted

🧠 Supported Mercedes FBS4 ECU Families

This service supports many Mercedes-Benz FBS4 ECUs, including but not limited to:

Gasoline ECUs

  • MED17

  • MED17.7

  • MED17.7.5

  • MED40

  • MED41

  • MED177

  • MED177.3

  • MED177.5

  • EMS71

Diesel ECUs (Bosch / Delphi)

  • CR40

  • CR41

  • CR42

  • CR43

  • CR6

  • CR60

  • CR60LS

  • CR61

  • CRR1

  • CRR1+

  • CRR2

  • CRD3

  • CRD3S2

  • SID310

Additional Families

  • MRD1

  • MRG1

  • MRG2

  • And other FBS4-based Mercedes ECUs

📌 Not sure if your ECU is supported?
Send us clear photos of the ECU label before ordering.

⚠️ Important Programming Notice (Read Carefully)

  • This service does NOT include vehicle programming

  • ECU must be programmed after installation

  • Programming can be done by:

    • Mercedes-Benz dealer

    • Independent shop with dealer-level coding access

  • We do not sell SCN coding or online Mercedes subscriptions

📦 How the Process Works

  1. Add this service to your cart and complete checkout

  2. Ship your ECU to the address on your receipt

  3. We virginize / renew the ECU on the bench

  4. ECU is returned ready for dealer or professional programming

🛠 Who This Service Is For

✔ Customers who purchased a used ECU
✔ Shops and locksmiths working on FBS4 systems
✔ Vehicles with destroyed original ECUs
✔ Anyone told “you need a new ECU from Mercedes”

Q: Can a Mercedes dealer virginize a used ECU?
A: No. Dealers only program new or already-virgin ECUs. Used ECUs must be virginized on the bench first.

Q: What years use the Mercedes FBS4 system?
A: Most Mercedes models from 2014 and newer use FBS4 immobilizer systems.

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