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Mercedes-Benz 3.0L M276.DE30 AL Biturbo Petrol Engine

A Refined V6 Powerplant with Performance and Luxury in Mind

The M276.DE30 AL is a key member of Mercedes-Benz’s M276 engine family, a modern V6 petrol engine introduced in 2010 as a successor to the aging M272 series. Built with performance, refinement, and emissions compliance in mind, the M276.DE30 AL brought with it an array of advanced technologies that marked a substantial evolution in Mercedes' petrol engine lineup.


This 3.0L V6 features an aluminium-alloy block and cylinder heads, combined with a 60-degree V6 layout and direct fuel injection. Its twin-turbocharged configuration delivers impressive power and torque across the rev range while maintaining strong fuel economy relative to its displacement. Key innovations include an integrated air-to-water intercooler, piezoelectric injectors for precise fuel delivery, and low-friction design elements for enhanced efficiency. It also meets strict Euro 6 emission standards and includes EGR and close-coupled catalytic converters for lower NOx output.


Balancing spirited performance with everyday drivability, the M276.DE30 AL became a staple in Mercedes-Benz’s executive and performance ranges. It offers quiet operation, quick throttle response, and reliable long-term operation, making it a top choice in the UK’s reconditioned engine market for both private and fleet use.


This engine powers a wide range of Mercedes-Benz models, including the Mercedes E400 engine, Mercedes CLS400, Mercedes S400, and Mercedes GLC 43 AMG. Other variants include the SL400 and GLE400, all of which benefited from the engine’s refined power delivery and strong mid-range torque.

Technical Specifications & Configuration

Engine Code
M276.DE30 AL
Engine Size
2996cc / 3.0 Litres
Cylinder Configuration
V6 - 60° Bank Angle
Aspiration
Bi-Turbocharged (Twin-Turbo)
Fuel Type
Petrol
Injection System
Direct Injection (Piezo Injectors)
Valvetrain
DOHC - 24 Valves with VVT
Compression Ratio
10.5:1
Cooling System
Water cooled with Electric Pump
Block Material
Aluminium Alloy
Head Material
Aluminium Alloy
Emission Standard
Euro 6 (with EGR & Catalytic Converters)
Power Output Range
272 - 333 PS (varies by model & year)
Torque Output
400 - 480 Nm
Turbo Configuration
Twin Turbo (Parallel Setup)
Fuel Economy (Est.)
29-35 MPG combined (vehicle-dependent)

Common Configurations

  • Mercedes-Benz E400 (W212): 333 PS V6 Biturbo, 7G-Tronic Auto, RWD
  • Mercedes-Benz CLS400 (C218): 333 PS, 9G-Tronic, RWD & 4MATIC options
  • Mercedes-Benz GLE400 (W166): 333 PS, 4MATIC AWD, 7G-Tronic Plus
  • Mercedes-Benz S400 (W222): 333 PS, luxury-tuned, 9G-Tronic Auto
  • Mercedes-Benz SL400 (R231): 367 PS version (facelift), 9-speed automatic
  • Mercedes-Benz C400 (W205): 333 PS, compact executive, AWD optional

Noteworthy Engineering Highlights

  • 🧊Aluminium block: Lightweight, thermally efficient construction
  • ⚙️Direct injection: Precise fuel control for power and economy
  • 🌬️Twin-turbo setup: Parallel twin-turbos reduce lag and boost torque
  • 🔄Camtronic system: Variable valve timing for performance and efficiency
  • 🛠️Multi-spark ignition: Advanced combustion tech for cleaner emissions
  • 🧪Start/Stop integration: Reduces idle consumption and CO₂ output

Engine Naming Reference

M276 DE30 AL, M276 3.0L Biturbo, M276 V6 Petrol, 3.0 V6 Twin Turbo, 333 PS V6, M276 E400 engine, SL400 engine code, CLS400 M276, E400 CGI, Mercedes-Benz 3.0 BiTurbo V6, DE30AL

Types of Mercedes-Benz M276.DE30 AL Replacement Engines Available

Mercedes-Benz M276.DE30 AL Rebuilt Engines

High-performance rebuilds with OEM-grade pistons, gaskets & timing chains.

Mercedes-Benz M276.DE30 AL Remanufactured Engines

Every unit fully stripped and rebuilt to match factory tolerances.

Mercedes-Benz M276.DE30 AL Reconditioned Engines

Carefully inspected, cleaned, and restored by seasoned petrol engine specialists.

Mercedes-Benz M276.DE30 AL Replacement Engines

Direct-fit petrol engines ideal for quick swaps and no-hassle installations.

Mercedes-Benz M276.DE30 AL Refurbished Engines

Budget-friendly, tested units with clean internals and compression-verified heads.

Mercedes-Benz M276.DE30 AL Used Engines

Hand-selected from breakers and verified by our expert mechanics.

Compatible Models with M276.DE30 AL Engine

Mercedes-Benz Compatible Models

Mercedes E‑Class E400 engine compatible with M276.DE30 AL V6 Biturbo

E‑Class E400
Mercedes CLS‑Class CLS400 engine compatible with M276.DE30 AL

CLS400
Mercedes S‑Class S400 engine using M276.DE30 AL Biturbo V6

S400
Mercedes GLC 43 AMG engine with M276.DE30 AL compatibility

GLC 43 AMG
Mercedes SL 400 engine with M276.DE30 AL fitted V6 Biturbo

SL400

M276.DE30 AL Engine Applications


Mercedes-Benz Saloons & Coupés

Mercedes-Benz logo
E‑CLASS E400 333PS
2016-2020
M276.DE30 AL V6 Bi‑Turbo
CLS400 333PS
2015-2018
C218 model, 9G‑Tronic Auto
S400 LWB 333PS
2013-2020
Long‑Wheelbase, luxury variant

Mercedes-Benz SUVs & Roadsters

Mercedes-Benz logo
GLE400 333PS
2015-2019
W166 platform, 4MATIC AWD
GLC 43 AMG 367PS
2016-2020
AMG tuned Bi‑Turbo
SL400 Roadster 367PS
2012-2019
R231, 9‑speed automatic

Common Mercedes-Benz M276.DE30 AL Engine Problems & Solutions


Pricing, Warranty & Availability

Most Popular

Rebuilt Mercedes-Benz M276.DE30 AL Engine

From
£4,350
(Supply Only)
  • ✔ Fully Disassembled & Rebuilt
  • ✔ OEM-Grade Replaced Parts
  • ✔ Like-New Condition
  • ✔ 12-24 Month Warranty

Reconditioned Mercedes-Benz M276.DE30 AL Engine

From
£3,450
(Supply Only)
  • ✔ Professionally Reconditioned
  • ✔ Thoroughly Inspected & Tested
  • ✔ Restored to OEM Standard
  • ✔ 12 Month Warranty
Cheapest Option

Used Mercedes-Benz M276.DE30 AL Engine

From
£1,900
(Supply Only)
  • ✔ Basic Inspection
  • ✔ Compression Tested
  • ✔ Known Service History
  • ✔ 30 Days to 3 Month Warranty

Refurbished Mercedes-Benz M276.DE30 AL Engine

From
£3,100
(Supply Only)
  • ✔ Partial Overhaul
  • ✔ Key Component Replacement
  • ✔ Cost-effective Option
  • ✔ 3 to 6 Month Warranty

📦 Stock Availability & Delivery Time

  • 🔄 High availability across UK suppliers
  • 🚚 Next-day delivery on in-stock units (supply only)
  • 🛠️ 7-10 day turnaround for rebuilt units
  • 📦 Free UK mainland delivery (select suppliers)

⭐ What You Get With Every Mercedes-Benz M276.DE30 AL Engine

  • 🧰 OEM-quality rebuilds using Mercedes-Benz-approved parts
  • 🔎 Full inspection reports w/ compression & leak-down tests
  • 📋 Engine serial & block codes verified
  • 💬 UK-based support before & after sale
  • 🔄 Exchange options for faulty units
  • 🧾 Simple returns & warranty claims

Mercedes-Benz M276.DE30 AL Engine Reconditioning Process


STEP 1 1 Day

Initial Inspection & Diagnostic Reporting

  • Visual & Dimensional Checks: Deck flatness, bore wear, and head warpage.
  • Oil & Coolant Analysis: Detect fuel dilution, glycol traces, or contamination.
  • Compression Testing: Verify ring and valve sealing before teardown.
STEP 2 1-2 Days

Complete Strip Down & Component Cleaning

  • Media Blast Cleaning: Remove carbon & sludge from internals.
  • Chemical Degreasing: Clean oil pump, HPFP, and turbo cores.
  • Part Identification: Catalog rods, pistons, and cams for traceability.
STEP 3 2-3 Days

Non-Destructive Testing & Machining

  • Crack Testing: Magnaflux and dye penetrant for structural faults.
  • Boring & Honing: Re-bore cylinders and hone for correct finish.
  • Crank Grinding: Undersize grind and dynamic balance.
  • Surface Milling: Flatness to <0.03mm deviation.
STEP 4 1 Day

Component Replacement with OEM Parts

  • Pistons & Rings: Forged internals matched to rebored block.
  • Timing Kit: New chain, guides, tensioner, sprockets.
  • Seals & Gaskets: All major gaskets and seals replaced.
  • Water & Oil Pump: New OEM pumps with updated specs.
STEP 5 1 Day

Assembly & Torque Angle Verification

  • Sequential Torque: Head & main bolts torqued to spec.
  • Phaser Setup: Cam phasers installed and OCVs verified.
  • Injector Setup: Calibrated with precision flow test bench.
STEP 6 1 Day

Hot Bench Dyno & Road Simulation

  • Cold Start Test: Oil pressure and tensioner function verified.
  • Load Simulation: Urban/motorway load profiles checked for leaks and stability.
  • Compression & Emissions: Ring seal and smoke tested before dispatch.
Mercedes-Benz replacement engine - Engine Finders

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  • ✔ Trusted UK Suppliers

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  • ✔ Expert Mercedes-Benz Defender Support

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  • ✔ Mercedes-Benz M276.DE30 AL Engines Specialists

    From Mercedes-Benz G-Class to the E-Class, we offer all variants (150PS / 180PS / 204PS).

  • ✔ Performance Matched with Experience

    Our remanufactured and reconditioned engines often meet or exceed OEM specs - ready for serious off-road and on-road action.

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Frequently Asked Questions - Mercedes-Benz M276.DE30 AL

What is the expected lifespan of the Mercedes-Benz M276.DE30 AL engine?

With proper maintenance, the Mercedes-Benz M276.DE30 AL can exceed 200,000 miles. Regular oil changes every 7,000-10,000 miles, using MB 229.5 approved oil, and timely replacement of spark plugs and coolant help prolong engine life. Avoiding excessive short trips and monitoring oil consumption are also key longevity practices.

What common problems affect the M276.DE30 AL engine?

Known issues include camshaft adjuster wear, timing chain stretch, and oil leaks around the valve cover and timing cover. These typically occur between 60,000 and 100,000 miles. Early symptoms include startup rattle, misfires, or rough idle. Prompt diagnosis and OEM part replacement can prevent major failure.

How much does a reconditioned M276.DE30 AL engine cost in the UK?

A fully rebuilt Mercedes-Benz M276.DE30 AL engine typically costs between £3,500 and £5,000, depending on supplier, mileage, and warranty length. Most come with a 12-month unlimited mileage warranty and require core exchange. Labour and optional parts like water pumps or turbos may add £800-£1,200.

Is the M276.DE30 AL engine suitable for remapping or tuning?

Yes, the M276.DE30 AL responds well to ECU remapping, with potential gains of +40-60hp and improved throttle response. However, ensure tuning is done by a reputable specialist familiar with Mercedes V6 engines. Always check DPF, turbo health, and fuel delivery systems before tuning to avoid complications.

What oil type and viscosity does the M276.DE30 AL require?

The recommended engine oil is SAE 0W-40 or 5W-40 fully synthetic, certified to MB 229.5 or MB 229.51 specification. Brands like Mobil 1, Liqui Moly, and Shell Helix are commonly used. Change intervals are typically every 10,000 miles or 12 months, whichever comes first.

Which Mercedes models use the M276.DE30 AL engine?

The M276.DE30 AL 3.0L biturbo V6 engine is commonly found in Mercedes-Benz E400, S400, GLE400, CLS400, and C400 models between 2013-2018. It's known for combining strong torque delivery with relatively smooth operation across luxury and performance trims.

Does the M276.DE30 AL engine suffer from timing chain issues?

Yes, early M276 engines were prone to timing chain stretch and wear of the tensioners, especially in vehicles driven with extended oil intervals. A rattling noise at cold start is a typical sign. Mercedes revised the design in later versions. If diagnosed early, a complete chain kit replacement can prevent serious damage.

What is the fuel economy of the M276.DE30 AL engine?

Fuel economy varies by model and driving conditions, but average real-world figures range from 25 to 32 MPG (UK). Highway cruising yields better results than urban driving. Turbocharged efficiency, combined with start-stop technology and proper tyre pressures, can help achieve closer to 30+ MPG consistently.

Can the M276.DE30 AL engine be used in swaps or retrofits?

Swapping an M276.DE30 AL into a compatible chassis (e.g., W212, W166) is feasible but requires the full ECU, wiring harness, and compatible 7G-Tronic or 9G-Tronic transmission. Immobilizer and emissions integration can complicate retrofits. It’s advisable only for skilled specialists familiar with CAN Bus and Mercedes electronic systems.