Is the Mercedes‑Benz CLC180 / CLC200 petrol engine reliable?

The M271 is rated ★★½☆☆. It's a smooth, responsive engine, but it has a well‑documented reputation for premature timing chain and camshaft adjuster failure — the simplex chain can stretch, and the adjuster sprockets wear, potentially causing catastrophic engine failure. Other issues include vacuum leaks, oil leaks from camshaft position sensors, and failed thermostats.

What are the common problems with the Mercedes‑Benz CLC180 / CLC200 petrol?

Timing chain and camshaft adjuster failure (the most critical — can destroy the engine), split vacuum hoses (causing rough idle), oil leaks from camshaft position sensors (can travel to the ECU), blocked crankcase breathers, failed thermostats, and occasional supercharger issues. The 5‑speed automatic transmission is bulletproof.

Is it worth replacing a Mercedes‑Benz CLC180 / CLC200 petrol engine, or should I scrap the car?

Depends on vehicle value and body condition. Against a well‑kept CLC worth £2,000–£5,000, a £2,200 recon is a significant investment — assess carefully. If the body is solid and the car has strong provenance, replacement can be worthwhile. Given the CLC's status as a stylish rear‑wheel‑drive coupe, good examples are worth saving.

How do I find my Mercedes‑Benz CLC petrol engine code?

Listed on the VIN plate and vehicle documentation. The CLC180 uses M271.946; the CLC200 uses M271.948 or M271.950. Tell us your registration date and we'll confirm it for free.

Can I repair the M271's timing chain, or does it need a new engine?

Yes — if caught early. A timing chain, camshaft adjuster and tensioner replacement (£800–£2,500) is far cheaper than a catastrophic chain failure (£1,200–£5,000 engine replacement). At the first sign of cold‑start rattle, book an inspection immediately. The early timing chain/sprocket wear can be assessed visually without a complete engine strip‑down.

Mercedes-Benz CLC180 / CLC200 Petrol2008–2011M271 1.8 Kompressor

Mercedes-Benz CLC180 / CLC200 Petrol Engine Replacement — Compare Prices & Get Quotes

Get quotes today from trusted UK Mercedes-Benz CLC specialists. Compare reconditioned, rebuilt and used M271 Kompressor engines — supply & fit available nationwide.

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Mercedes CLC Petrol Engines — from £900 to £5,000Code: M271

Mercedes CLC Petrol Engines — from £900 to £5,000· Code: M271

Instant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK‑Wide Network

The CLC180 / CLC200 PETROL THROUGH TIME — Era Map

Four generations. Four eras. One guide to reliability, costs and what really matters.

Era Note

The 143 bhp M271 — smooth and responsive, but timing gear failure is the defining weakness.

GenerationYearsEngine CodeReliabilityRecon CostEra Note

CL203 (CLC180 Kompressor) BMW 320d CL203 (CLC180 Kompressor)

2008–2011M271.946 (1.8 Kompressor)★★½☆☆ [NEWLY ASSIGNED — see Data Note]£1,200–£3,000 [MB‑QUOTE]The 143 bhp M271 — smooth and responsive, but timing gear failure is the defining weakness.

CL203 (CLC200 Kompressor) BMW 320d CL203 (CLC200 Kompressor)

2008–2011M271.948 / M271.950 (1.8 Kompressor)★★½☆☆ [NEWLY ASSIGNED — see Data Note]£1,500–£4,000 [MB‑QUOTE]The 184 bhp M271 — same engine, higher tune; same timing chain and camshaft adjuster risks.

Why use this era map?

Every cost guide, reliability rating and engine code on this page is aligned to the data above. This keeps everything consistent and trustworthy.

Real UK Cost Data

Verified Reliability

Expert Insights

Updated for 2025

Mercedes-Benz CLC180 / CLC200 Petrol Engine Replacement Costs

Supply Only£1,200–£3,000

Fitted (Indie)£1,900–£4,000

Warranty12 months

Best ForMost owners — best cost/warranty balance

Engine TypeSupply OnlyFitted (Indie)WarrantyBest For

Used Engine£900–£1,800£1,500–£2,6001–3 monthsBudget priority; vehicle under £3,000

Reconditioned Engine£1,200–£3,000£1,900–£4,00012 monthsMost owners — best cost/warranty balance

Rebuilt Engine£2,000–£5,000£2,700–£6,00012–24 monthsLong‑term ownership; 3+ year horizon

Main Dealer New£6,000–£10,000£7,500–£12,00024–36 monthsInsurance jobs, warranty claims

Labour estimate: Fitting a CLC petrol engine typically takes 8–12 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer). Timing chain replacement on the M271 is typically a one‑day job.

Common Problems

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Mercedes-Benz CLC180 / CLC200 Petrol — Repair, Buy, or Replace?

Every 320d has a story. Make the right call with clear data, real-world costs, and honest guidance from UK specialists.

Mercedes-Benz CLC180 / CLC200 Petrol — Repair, Buy, or Replace?

Every 320d has a story. Make the right call with clear data, real-world costs, and honest guidance from UK specialists.

Can It Be Repaired?

ProblemRepairable?Typical CostWhen It Makes SenseTiming chain and camshaft adjuster wear (M271)✅ Yes£800–£2,500If caught early; preemptive replacement of sprocket wheels is a plusSplit vacuum hose (M271)✅ Yes£100–£300Access is labour‑intensive but straightforwardOil leak from camshaft position sensors (M271)✅ Yes£150–£400Preventative — catch it before oil reaches the ECUBlocked crankcase breather (M271)✅ Yes£100–£300Replacing the breather prevents engine management light issuesFailed thermostat (M271)✅ Yes£150–£400Replace when engine doesn't reach 80°C quicklySupercharger issues (M271)✅ Yes£500–£1,500Repair or replace supercharger; less common than timing chain issues

Buying This CLC Petrol? Check These First

Buy If

Full Mercedes service history with documented oil changes
Evidence of timing chain and camshaft adjuster replacement — this is the number one preventative item
Camshaft sprocket wheels replaced preemptively
No rattles on cold start — the single most important check
5‑speed automatic transmission (bulletproof) rather than the less popular manual

Avoid If

Cold‑start rattle with no timing chain history — this is the single most important check
Oil in the camshaft position sensor connectors — potential ECU damage risk
Rough idle with no diagnosis — likely vacuum leak
Engine warning light with no diagnosis documentation
Poor service history — the M271 is unforgiving of neglect

Closing Verdict

The CLC180 and CLC200 are stylish, rear‑wheel‑drive coupes that offer a premium driving experience. But the M271 engine has a well‑deserved reputation for timing chain and camshaft adjuster failure — this can be catastrophic if ignored. Buy on service history and proof of preventative timing chain work. The 5‑speed automatic transmission is bulletproof. If you're replacing, a reconditioned unit with a 12‑month warranty is the sweet spot.

20+ Vetted Specialists UK Network

12-Month Warranty as Standard

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Buying Checklist

Before you buy a used Mercedes‑Benz CLC180 / CLC200 Petrol (or before you commit to an engine replacement), check these:

Cold Start — Listen for rattling noise on startup (timing chain and camshaft adjuster warning — the most critical check)

Service History — Including which engine variant (M271.946 for CLC180, M271.948/950 for CLC200) — see the Era Map above

Camshaft Sensor Connectors — Disconnect and check for oil — oil in the plug could mean a new ECU

Idle Quality — Any hunting or rough idle? Vacuum hose split or crankcase breather blockage

Engine Temperature — Does the engine reach 80°C quickly? Failed thermostat indicator

Supercharger Health — Any unusual noise or loss of power? Supercharger issues are less common but possible

Transmission — Check for leaking pilot bush on the 5‑speed automatic

Engine Warning Light — Have codes been read? Any unresolved timing, vacuum, or emissions issues?

Buy smart. Drive with confidence.

A few checks today can save thousands tomorrow. Use this checklist to avoid the most common 320d pitfalls.

Buy smart. Drive with confidence.

A few checks today can save thousands tomorrow. Use this checklist to avoid the most common 320d pitfalls.

Engine Codes

M271.946

Years2008–2011

Power143 bhp / 210 Nm

2025 Enquiries— (pattern data)

Avg. Recon Cost£1,200–£3,000 [MB‑QUOTE]

Engine CodeYearsPower2025 EnquiriesAvg. Recon Cost

M271.9462008–2011143 bhp / 210 Nm— (pattern data)£1,200–£3,000 [MB‑QUOTE]

M271.948 / M271.9502008–2011184 bhp / 250 Nm— (pattern data)£1,500–£4,000 [MB‑QUOTE]

Technical Specs

M271

Displacement1,796cc

Cylinders4‑cylinder inline

Bore × Stroke82.0 × 85.0 mm

Compression Ratio9.0:1 to 10.5:1 (varies by variant)

Fuel SystemMulti‑point fuel injection (MPFI)

InductionSupercharged (Kompressor)

ValvetrainDOHC, 4 valves per cylinder, with variable valve timing

Market Intelligence

Most Common Failure

Timing chain and camshaft adjuster wear — approximately 55% of M271 enquiries

[PATTERN DATA]

Average Enquiry Mileage

58,000

miles

[PATTERN DATA]

Average Replacement Cost

£2,200

reconditioned, supply only

[MB‑QUOTE]

Most Requested Engine Code

M271

[MB‑VERIFIED]

Peak Enquiry Season

Winter — cold starts expose timing chain issues

[PATTERN DATA]

Regional Demand

London22%

South East20%

Midlands15%

PATTERN DATA

Regional Demand Breakdown

22%London

20%South East

Frequently Asked Questions

All prices are indicative UK market ranges based on historical quote data from our network of engine specialists. Actual costs vary by variant, engine code, damage severity and workshop location. Use our free comparison tool to get tailored quotes. Every engine supplied through EnginesMarket carries a minimum 12‑month unlimited‑mileage warranty — always confirm terms with your chosen supplier.

Find the best Mercedes‑Benz CLC180 / CLC200 petrol engine replacement UK drivers rely on. Compare prices from trusted specialists on EnginesMarket today and keep your stylish coupe on the road.

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No hidden fees

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Get quotes with zero pressure

UK Specialists

20+ vetted experts

12-Month Warranty

As standard

Nationwide Delivery

Supply & fit available