Genuine Bosch MED17.7.3 engine control module (ECU / ECM / PCM / engine computer) for Mercedes-Benz M278 4.7L and M157 5.5L twin-turbo V8 engines. We fully refurbish, test, and program each unit to your vehicle's VIN — it arrives plug and play, no dealer visit or additional coding required. OEM Mercedes part number A2789001300 (Bosch 0261S07813); interchanges with 2789001200 / Bosch 0261S08472. Covers 2013–2020 E550, CLS550, GL550, GLS550, ML550, SL550, and the 63 AMG variants, plus more.

• Type: Engine Control Module (ECU / ECM / PCM / DME / engine computer)
• Manufacturer: Bosch (OEM) — MED17.7.3 platform
• Mercedes part number: A2789001300 / 2789001300 / 278-900-13-00
• Bosch number: 0261S07813
• Interchange / companion number: 2789001200 · Bosch 0261S08472
• Supersedes / replaces: 2789001300, 278900130080, 278900130087, 278-900-13-00-64
• Engines: M278 4.7L V8 biturbo (gas) · M157 5.5L V8 biturbo (AMG "63")
• Condition: Professionally refurbished OEM unit — tested, cloned/programmed to your VIN
• Ready to install: Yes — 100% plug and play, no additional dealer programming
• Warranty:  6 months

A used Mercedes ECU pulled from another car cannot be programmed by your local dealer and will not start your vehicle as-is. We solve that: send us your original faulty module (or your VIN), and we program this unit so it's married to your car's immobilizer and drives away on first key-on. No SCN coding trip, no locksmith, no towing to the dealer.

How it works:

1. Order and send us your VIN (and your old ECU if you have it — recommended for exact cloning).
2. We refurbish, bench-test, and program the module to your VIN.
3. It ships plug and play. Bolt it in, connect the plugs, start the car.

FREQUENTLY ASKED QUESTIONS

Is this really plug and play? Yes. We program the module to your VIN before shipping, so it's synced to your car's immobilizer. Install it and start the engine — no dealer coding required.

What do you need from me? Your VIN at minimum. Sending your original ECU along with the order lets us clone it exactly, which is the most reliable method.

Will the dealer be able to program a used ECU instead? No. Mercedes dealers cannot re-program a used/secondhand ECU to a different car. That's the specific problem this service solves.

What's the difference between an ECU, ECM, PCM, and DME? They're different names for the same engine control computer. Mercedes and Bosch call it the ME/MED control unit; others say ECU, ECM, PCM, or DME. This is the Bosch MED17.7.3.

How do I know this fits my car? Match the OEM number printed on your existing module: 2789001300 or 2789001200 (Bosch 0261S07813 or 0261S08472). If it matches, this unit fits. Send your VIN and we'll verify for you.