Mercedes-Benz M271 Engine Replacement - Rebuilt & Reconditioned Units from £2,350

Genuine fitment for Vito 109, 111, 114 (W639, 2007–2014). Every Mercedes-Benz M271 unit is bench-tested to OEM standards before dispatch, with a 12-month unlimited-mileage warranty as standard. Compare quotes from vetted UK specialists and save up to 60% versus a main dealer.

M271 Engine Specialists - From C-Class to SLK-Class, we offer all variants (156PS / 184PS / 204PS)

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Mercedes-Benz 1.8L M271.DE18 ML Petrol Engine

Turbocharged Efficiency with German Precision

The Mercedes-Benz M271.DE18 ML engine is part of the M271 engine family, a petrol inline-4 series developed by Daimler AG and widely used across multiple model ranges from 2002 to 2015. This particular variant - the DE18 ML - was introduced with advancements like direct fuel injection (CGI - Charged Gasoline Injection) and a turbocharger, marking a shift from the older supercharged “Kompressor” configurations. Designed to balance power and emissions, the DE18 ML brought a notable improvement in torque delivery and fuel economy over its predecessors while maintaining the refinement expected from a Mercedes-Benz powertrain.


Built on a lightweight aluminium block with dual overhead camshafts and variable valve timing (VVT), the M271.DE18 ML was engineered to deliver spirited performance with enhanced thermal efficiency. It replaced earlier naturally aspirated and supercharged engines like the M111 and earlier Kompressor variants, and was later succeeded by the M274 turbocharged unit. This evolution was part of Mercedes-Benz’s drive to meet Euro 5 and Euro 6 emissions standards while also offering improved durability and reliability for long-term use.


Due to its widespread application, solid engineering, and respectable performance figures (typically ranging from 156PS to 204PS), the M271.DE18 ML remains a popular engine in the UK reconditioned and replacement market. It’s well-suited for daily driving while offering just enough excitement for the enthusiast segment, making it a preferred option for those restoring or maintaining legacy C-Class and SLK models.


Commonly found in vehicles like the Mercedes C180 CGI BlueEFFICIENCY, C200 CGI, E200 CGI, and the sportier SLK200 Kompressor, this engine delivers a perfect balance of modern engineering and legacy Mercedes charm.

Technical Specifications & Configuration

Engine Code
M271.DE18 ML
Engine Size
1796cc / 1.8 Litres
Cylinder Configuration
Inline 4 cylinder (I4)
Aspiration
Turbocharged (CGI Direct Injection)
Fuel Type
Petrol
Injection System
Direct Injection (CGI)
Valvetrain
DOHC - 16 valves with VVT
Compression Ratio
9.3:1
Cooling System
Water cooled
Block Material
Aluminium Alloy
Head Material
Aluminium Alloy
Emission Standard
Euro 5 (with EGR, no DPF)
Power Output Range
156 - 204 PS (varies by variant)
Torque Output
250 - 310 Nm
Turbo Configuration
Single Scroll Turbocharger
Fuel Economy (Est.)
32-42 MPG combined (model dependent)

Common Configurations

  • Mercedes-Benz C180 Kompressor (W204): 156 PS, 5-speed Auto
  • Mercedes-Benz SLK200 (R171): 163 PS, 6-speed Manual
  • Mercedes-Benz E200 Kompressor (W211): 184 PS, RWD
  • Mercedes-Benz C-Class Coupe (C204): 156 PS, 7G-Tronic Auto
  • Mercedes-Benz CLK200 (C209): Kompressor variant with Tiptronic
  • Mercedes-Benz Vito 1.8: Light-duty commercial use variant

Noteworthy Engineering Highlights

  • 🔧Roots-type supercharger: Integrated for linear boost delivery
  • 🛠️Aluminium cylinder block: Lightweight for improved efficiency
  • 🔥Variable valve timing (VVT): Optimised power and emissions
  • 🧊Intercooled intake system: Boosts power and thermal stability
  • ⚙️Timing chain system: Durable, low-maintenance valvetrain

Engine Naming Reference

M271.DE18 ML, M271EVO, M271 1.8L Kompressor, Mercedes 1.8 Supercharged, C180K, E200K, M271 inline-4, 1.8 CGI, Kompressor petrol, M271K, 1.8L R4 Benziner, W204 1.8 engine

Types of Mercedes-Benz M271.DE18 ML Replacement Engines Available

Mercedes-Benz M271.DE18 ML Rebuilt Engines

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

Mercedes-Benz M271.DE18 ML Remanufactured Engines

Every unit fully stripped and rebuilt to match factory tolerances.

Mercedes-Benz M271.DE18 ML Reconditioned Engines

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

Mercedes-Benz M271.DE18 ML Replacement Engines

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

Mercedes-Benz M271.DE18 ML Refurbished Engines

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

Mercedes-Benz M271.DE18 ML Used Engines

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

Compatible Models with M271.DE18 ML Engine

Mercedes‑Benz Compatible Models

Mercedes C‑Class W204 with M271 DE18 ML engine

C‑Class W204
Mercedes SLK R172 with M271 DE18 ML engine

SLK‑Class R172
Mercedes E‑Class W212 equipped with M271 DE18 ML turbo engine

E‑Class W212/C207

M271.DE18 ML Engine Applications


Mercedes‑Benz Saloons

Mercedes-Benz Logo
C‑CLASS W204 156-204HP
2010-2013
C 180 CGI (156 PS), C 200 CGI (184 PS), C 250 CGI (204 PS)
E‑CLASS W212 / C207 184-204HP
2009-2013
E 200 CGI (184 PS), E 250 CGI (204 PS)

Mercedes‑Benz Coupés & Roadsters

Mercedes-Benz Logo
SLK 200 / 250 R172 184-204HP
2011-2015
SLK 200 CGI (184 PS), SLK 250 CGI (204 PS)
CLC‑CLASS / CLK 200 CGI 170-184HP
2003-2013
CLK 200 CGI (170 PS), CLC 200 CGI (184 PS)

⚠️ Note: Ensure your vehicle’s chassis code matches W204, W212, or R172 with M271 DE18 ML code. Contact support for a free compatibility check.

Common Mercedes-Benz OM654.DE20 LA Engine Problems & Solutions


Pricing, Warranty & Availability

Most Popular

Rebuilt Mercedes-Benz M271.DE18 ML Engine

From
£2,350
(Supply Only)
  • ✔ Fully Disassembled & Rebuilt
  • ✔ OEM-Grade Replaced Parts
  • ✔ Like-New Condition
  • ✔ 12-24 Month Warranty

Reconditioned Mercedes-Benz M271.DE18 ML Engine

From
£1,800
(Supply Only)
  • ✔ Professionally Reconditioned
  • ✔ Thoroughly Inspected & Tested
  • ✔ Restored to OEM Standard
  • ✔ 12 Month Warranty
Cheapest Option

Used Mercedes-Benz M271.DE18 ML Engine

From
£1,300
(Supply Only)
  • ✔ Basic Inspection
  • ✔ Compression Tested
  • ✔ Known Service History
  • ✔ 30 Days to 3 Month Warranty

Refurbished Mercedes-Benz M271.DE18 ML Engine

From
£1,500
(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 M271.DE18 ML 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 M271.DE18 ML 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 replacement engine - Engine Finders

Why Choose Engine Finders for Mercedes-Benz M271.DE18 ML Petrol Engine?

At Engine Finders, we don’t just sell engines - we deliver peace of mind. Here’s why Mercedes-Benz owners across the UK trust us:

  • ✔ Trusted UK Suppliers

    We work exclusively with vetted UK suppliers who specialize in Mercedes-Benz engines - no middlemen, no guesswork.

  • ✔ Save Up to 60% vs Dealership

    Why overpay? Compare quotes from multiple sellers & save up to 60% on Land Rover replacement engines, get top-tier quality for less.

  • ✔ Tested & Certified Engines

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  • ✔ Fast Quotes & Faster Delivery

    Quick quotes, nationwide delivery, and optional vehicle recovery, get your Mercedes-Benz back on the road in no time.

  • ✔ Expert Mercedes-Benz Defender Support

    Need help? Our friendly Land Rover specialists guide you through engine compatibility, specs, and installation process.

  • ✔ Mercedes-Benz M271.DE18 ML 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.

  • ✔ We Work for You - Not the Suppliers

    We’re 100% on your side, helping you choose the best engine deal instead of just pushing supplier specials.

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Frequently Asked Questions - Mercedes‑Benz M271.DE18 ML

How much does a remanufactured Mercedes-Benz M271.DE18 ML cost in the UK?

A fully reconditioned Mercedes‑Benz M271.DE18 ML engine typically costs between **£1,800 - £3,200**, depending on mileage, mileage warranty and supplier. Warranty often includes core exchange and 12‑month unlimited mileage. Labour and turbo refurb options will uplift the final price.

What is the typical lifespan of a Mercedes‑Benz M271.DE18 ML engine?

With regular servicing every **5,000-7,500 miles**, using **0W‑30 or 5W‑30 engine oil**, the M271.DE18 ML can reliably exceed **150,000 miles**. Early Kompressor variants often saw timing chain issues around 60,000-100,000 miles. EVO versions (DE18 LA/ML) with direct injection improve longevity.

What are known M271.DE18 ML engine faults to watch for?

The most frequent issue is **timing chain stretch or tensioner failure**, which causes rattling on cold start and misfires. Other common faults include **oil leaks around filter housing**, **vacuum hose splits**, blocked breather, failed thermostat, or turbocharger faults on turbo models :contentReference[oaicite:1]{index=1}.

Can the timing chain on M271.DE18 ML be replaced before failure?

Yes. Mercedes offers upgrade kits with steel-backed sprockets and improved tensioners (e.g. BGA TC5690). These prevent premature wear. Replacement before symptoms - especially around 80,000 miles - can avert catastrophic damage and bent valves :contentReference[oaicite:2]{index=2}.

What maintenance does my M271.DE18 ML need (oil, intervals, filters)?

Use **fully‑synthetic 0W‑30 or 5W‑30** low‑ash oil, change every **5,000-7,500 miles**, with OEM filter. Clean airbox, MAF sensor and crankcase breather every 20,000 miles. Replace thermostat and inspect vacuum hoses regularly to prevent airflow issues :contentReference[oaicite:3]{index=3}.

Is it safe to remap the M271.DE18 ML for extra power?

Yes - **Stage 1 ECU remaps** can safely deliver **+30‑40 bhp and +50 Nm torque**, improve throttle response, and work with both manual and auto gearboxes. It’s legal on road if emissions systems remain intact (EGR/DPF). Use certified tuning via OEM‑level tools for reliability.

Can the M271.DE18 ML engine unit be swapped into other Mercedes models?

Yes - the M271.DE18 ML is compatible with C‑Class (W204), E‑Class (W212/C207), SLK (R172), and CLK/CLC variants where the original engine was a **1.8 CGI or Kompressor**. Swaps require compatible ECU, wiring and gearbox mounts. Many UK tuning shops offer full swap kits.

Does the M271.DE18 ML support Euro 5/6 emissions systems?

Yes - it meets **Euro 5 standards**, with factory-fitted **EGR** and **DPF** only on later BlueEFFICIENCY models. AdBlue is **not used**. Software optimisations are compatible with both manual and auto versions to preserve MOT compliance.

How can I tell if my engine is the M271.DE18 ML variant?

Check the engine code sticker under the cam cover (e.g. “M271.DE18 ML” or “DE18LA”). Cross-reference with service history dates (2009-2015 models). A free chassis compatibility check via our site or dealer can confirm fitment in C250, E200 CGI, SLK200/250 models.