Mercedes-Benz M256 Engine
Used & Reconditioned for Sale
M256 920, M256 930, 3.0 EQ Boost, AMG 53 engine, Mercedes 3.0 inline 6 turbo
Displacement
Fuel
Production
SUB — 90–150 chars: Fits E-Class, CLS, S-Class and more — verified fitment by registration, fixed prices, UK delivery.
Displacement
Fuel
Production
Configuration
Applications
Verified Fitment
Checked by registration
12-Month Warranty
On reconditioned units
UK Nationwide Delivery
2-4 working days
14-Day Returns
Uninstalled, full refund
Buy a M256 Engine for Your Vehicle
INTRO: 130–200 chars. The Mercedes-Benz M256 3.0‑litre inline‑six with EQ Boost is the brand's advanced mild‑hybrid petrol engine, powering E‑Class, CLS, S‑Class, GLE and AMG GT 53 models. We offer 4 distinct application groups, each configured and priced for its specific vehicle — all units are tested and warranted.
M256 – E-Class W213 & CLS C257
E-Class W213 / CLS C257 (450/53) 2018–2023
£6,500
Coming soonM256 – S-Class W222
S-Class W222 S450/S500 2017–2020
£7,000
Coming soonM256 – GLE W167
GLE W167 450/53 AMG 2019+
£7,500
Coming soonM256 – AMG GT 4-Door
AMG GT 53 4-Door 2019+
£13,500
Coming soonFull M256 Compatibility
INTRO: 120–200 chars; every row links to its unit page + reg-checker confirmation. The M256 EQ Boost engine is fitted across Mercedes‑Benz's premium saloon, coupé, SUV and performance ranges from 2017 onward. Use the table below to find your exact chassis and variant, then click through to the correct application group for your vehicle.
| Model | Chassis | Variants | Years | Config. | Unit page |
|---|---|---|---|---|---|
| E-Class | W213 / S213 | E450, E53 AMG | 2018–2023 | Longitudinal | Coming soon |
| CLS | C257 | CLS450, CLS53 AMG | 2018–2023 | Longitudinal | Coming soon |
| S-Class | W222 / V222 | S450, S500 (facelift) | 2017–2020 | Longitudinal | Coming soon |
| GLE (M-Class) | W167 / V167 | GLE450, GLE53 AMG | 2019–present | Longitudinal | Coming soon |
| AMG GT (4-Door) | C190 / X190 | AMG GT 53 | 2019–present | Longitudinal | Coming soon |
Confirm your exact specification with the registration checker above.
M256 Engine Prices
INTRO: 120–200 chars. We offer the M256 3.0 EQ Boost in used and reconditioned condition across four application groups. Used units are exceptionally scarce; reconditioned units are strongly recommended to ensure the complex 48V integrated starter‑generator (ISG) and electric auxiliary compressor (eZV) are fully tested and warrantied.
| Application | Used from | Reconditioned from |
|---|---|---|
| E-Class W213 & CLS C257 (450 / 53 AMG) | £6,500 | £9,500 |
| S-Class W222 (S450 / S500) | £7,000 | £10,500 |
| GLE W167 (450 / 53 AMG) | £7,500 | £11,000 |
| AMG GT 4-Door (GT 53\) | £9,500 | £13,500 |
DISCLAIMER (verbatim): "Prices shown are current lowest listed prices and update as stock changes. The price on each listing is the price you pay — no hidden fees at checkout.
What You Get with a M256 Engine
What You Get with a M256 Engine
What's included
Not included
Used or reconditioned?
Given the recent introduction of the M256 (2017+) and the high value of its host vehicles, used units are exceptionally scarce and command a significant premium. Reconditioned units are the strongly recommended route for warranty-backed replacement, as specialist 48V calibration and eZV testing are critical to the engine's operation. The M256 3.0L inline-6 with EQ Boost represents Mercedes-Benz's return to the straight-six configuration, integrating a complex 48-volt electrical system, an integrated starter-generator (ISG), and an electric auxiliary compressor (eZV). Replacement demand is currently driven by early high-mileage fleet examples and complex 48V system/component failures that necessitate a complete, tested long-block and ancillary swap rather than in-situ repair. A prepared M256 unit addresses these wear points and ensures 48V calibration readiness before dispatch.
M256 Engine Buying FAQs
Answers to common fitment, condition, warranty and delivery questions.
A:Mercedes-Benz E-Class W213 (E450, E53 AMG), CLS C257 (CLS450, CLS53), S-Class W222 (S450, S500), GLE W167 (GLE450, GLE53), and AMG GT 4-Door (GT 53).
A:M256 is the base code. "3.0 EQ Boost" is the marketing term for the 48V mild-hybrid system. "AMG 53" refers to the high-output performance tune of this exact physical engine. Internal sub-codes include M256 920 and M256 930.
A:Given the recent introduction of the M256 (2017+) and the high value of its host vehicles, used units are exceptionally scarce and command a significant premium. Reconditioned units are the strongly recommended route for warranty-backed replacement, as specialist 48V calibration and eZV testing are critical to the engine's operation.
A:Use the registration checker to confirm chassis code and exact variant (e.g., E450 vs E53). Cross-reference the engine code stamp on the block (M256). 48V harness connectors and ECU coding are chassis-specific; confirm your exact VIN requirements before ordering.
A:6–12 month warranty depending on condition. UK nationwide palletised delivery. Free compatibility check before dispatch. 48V system coding by a Mercedes specialist is required post-installation.
Check M256 Fitment for Your Vehicle
CTA_H2: Check M256 Fitment for Your Mercedes