Is the Mercedes A‑Class A250 engine reliable?

It depends which generation your A250 is. The W176's M270 (2013–2018) is generally reliable but has a well‑documented timing chain weakness — many specialists recommend replacing the chain at 70,000+ miles. The W177's M260 (2018–2025) is more powerful but has proven less reliable, with cylinder head failures and cracked exhaust valves reported. Check the Era Map above for your specific car.

What are the common problems with the Mercedes A‑Class A250 engine?

W176 (M270): timing chain stretch, Camtronic system failures, carbon buildup on intake valves, thermostat housing leaks, and MAP sensor failures. W177 (M260): cylinder head failures, cracked exhaust valves, misfires, and low compression. The 2.0‑litre M260 has proven less reliable than the 1.3‑litre M282.

Is it worth replacing an A250 engine, or should I scrap the car?

Depends on vehicle value and generation. A W176 A250 is a £5,000–£12,000 vehicle — a £3,500–£4,500 recon is 29–90% of the car's value. A W177 A250 is a £12,000–£25,000 vehicle — a £4,500–£5,500 recon is 18–46% of the car's value. For lower‑value W176 examples (sub‑£6,000), replacement may approach or exceed our 70% Mercedes scrap threshold. Evaluate carefully based on your car's generation and condition.

How do I find my Mercedes A‑Class A250 engine code?

Listed on the VIN plate and vehicle documentation. The A250 covers M270DE20LA (W176, 2013–2018) and M260 (W177, 2018–2025). Tell us your registration date and we'll confirm which one you have for free.

Can I prevent the common failures on an A250?

On W176 M270: timing chain replacement at 70,000+ miles is strongly recommended. Regular oil changes with MB 229.5 spec oil every 10,000–15,000 km are essential. On W177 M260: if you experience misfires, have the cylinder head inspected immediately — catching a cracked valve early can save you from a £4,000+ repair bill. Both engines benefit from periodic walnut blasting (carbon cleaning) every 60,000 miles. At the first sign of cold‑start rattle, misfire or rough idle, book an inspection immediately.

Mercedes A‑Class A2502013–2025M270 / M260

Mercedes A‑Class A250 Engine Replacement — Compare Prices & Get Quotes

The A250 badge spans two generations of Mercedes' premium hatchback — the W176 with the M270 2.0 turbo and the W177 with the M260 2.0 turbo. Get quotes from trusted UK specialists today.

Supply & Fit Available

12-Month Warranty

Nationwide Delivery

25+ Specialists

Supply & Fit Available

12-Month Warranty

Nationwide Delivery

25+ Specialists

Mercedes A250 Engines — from £1,500 to £7,800M270 / M260

Mercedes A250 Engines — from £1,500 to £7,800· M270 / M260

Instant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide Network

The A250 THROUGH TIME — Era Map

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

GenerationYearsEngine CodeReliabilityRecon CostEra Note

Why use this era map?

This table is the single source every other section on this page matches — Sections 2, 4 and 6 reference it rather than restating conflicting figures.

Real UK Cost Data

Verified Reliability

Expert Insights

Updated for 2025

Mercedes A‑Class A250 Engine Replacement Costs

Supply Only£3,000–£6,500

Fitted (Indie)£4,200–£8,000

Warranty12–24 months

Best ForMost owners — best cost/warranty balance

Engine TypeSupply OnlyFitted (Indie)WarrantyBest For

Used Engine£1,500–£3,500£2,500–£4,8001–6 monthsBudget priority; vehicle under £8,000

Reconditioned Engine£3,000–£6,500£4,200–£8,00012–24 monthsMost owners — best cost/warranty balance

Rebuilt Engine£4,500–£7,800£5,700–£9,40012–24 monthsLong-term ownership; 3+ year horizon

Main Dealer New£6,500–£10,000£7,700–£11,80024–36 monthsInsurance jobs, warranty claims

Figures above reflect the range across both generations; specific costs vary by era — see the Era Map above. A replacement M260 engine costs on average £5,834, with new or reconditioned units up to £7,779. A cylinder head replacement on a W177 A250 can cost up to £4,000.

Labour estimate: Fitting an A250 engine typically takes 10–14 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer).

→ Compare A250 engine prices from UK specialists

Common Problems

1. Timing Chain Stretch / Tensioner Wear (M270 — W176, 2013–2018)

Symptoms: Rattling noise on cold start (often from 70,000+ miles), metallic ticking, rough idle, loss of power, camshaft timing fault codes (P001685/P001785).

Typical mileage: 70,000–100,000 miles

Repair cost: £1,200–£2,800 (chain, guides and tensioner replacement)【PLACEHOLDER — confirm vs cost sheet】

Replacement cost: £3,000–£6,500 (full engine replacement if chain snaps)

🔴 Immediate - if you hear rattle, book an inspection today

Our recommendation:

Timing chain stretch is the most common issue on the M270 engine. If you hear a rattling noise on cold start, have the chain inspected immediately — ignoring it can lead to catastrophic engine failure. Regular oil changes every 10,000–15,000 km with 100% synthetic oil (MB 229.5 spec) are essential. Some M270 engines also suffer from camshaft actuator wear, which can be addressed with an updated part (A2700501147).

1. Timing Chain Stretch / Tensioner Wear (M270 — W176, 2013–2018)

Symptoms: Rattling noise on cold start (often from 70,000+ miles), metallic ticking, rough idle, loss of power, camshaft timing fault codes (P001685/P001785).

Typical mileage: 70,000–100,000 miles

Repair cost: £1,200–£2,800 (chain, guides and tensioner replacement)【PLACEHOLDER — confirm vs cost sheet】

Replacement cost: £3,000–£6,500 (full engine replacement if chain snaps)

🔴 Immediate - if you hear rattle, book an inspection today

Our recommendation:

2. Cylinder Head / Cracked Exhaust Valve (M260 — W177, 2018–2025)

Symptoms: Misfire, engine management light, car entering limp mode, loss of power, rough idle.

Typical mileage: 30,000–60,000 miles

Repair cost: £2,000–£4,000 (cylinder head replacement)【PLACEHOLDER — confirm vs cost sheet】

Replacement cost: £4,000–£7,800 (full engine replacement if damage is extensive)

🔴 Immediate - if you experience misfires or limp mode, book an inspection today

Our recommendation:

The M260 engine in the W177 has proven less reliable than the 1.3‑litre M282. Cylinder head failures (cracked exhaust valves, low compression in cylinders) have been reported at as little as 45,000 miles. A cylinder head replacement can cost up to £4,000. If you experience misfires or the engine management light comes on, have the engine diagnosed immediately. Some owners have reported needing new cylinder heads after multiple misfire events.

3. Carbon Buildup on Intake Valves (M270 & M260)

Symptoms: Rough idle, hesitation on acceleration, misfires, loss of power, increased fuel consumption.

Typical mileage: 50,000–80,000 miles

Repair cost: £300–£600 (walnut blasting / carbon cleaning)【PLACEHOLDER — confirm vs cost sheet】

Replacement cost: N/A — repair only

🟡 Monitor - book inspection soon

Our recommendation:

Both the M270 and M260 are direct‑injection engines, which means carbon can build up on the intake valves over time. Periodic intake cleaning (walnut blasting) every 60,000 miles can restore performance. If you notice hesitation or poor throttle response, a carbon clean is often the solution. This is particularly important if the car is frequently driven in the city.

Ready to Compare?

Get Matched With a Vetted Mercedes Specialist

25+ vetted Mercedes specialists, every A250 engine generation covered, with a 12‑month warranty as standard.

Get My Free A250 Engine Quotes Now

A250 — 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.

A250 — 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 stretch (M270)✅ Yes£1,200–£2,800Catch it early — before chain snapsCylinder head failure (M260)✅ Yes£2,000–£4,000Catch it early — before damage becomes catastrophicCarbon buildup (both engines)✅ Yes£300–£600Routine maintenance — improves performance and MPGCamshaft actuator wear (M270)✅ Yes£500–£1,200Replace with updated part — permanent fixSevere engine damage (chain snap / valve failure)❌ Usually NoEngine replacementLittle left to salvage — replacement is the only option

Buying This A250? Check These First

Buy If

W176 (2013–2018): timing chain replaced or inspected (or budget for it at 70,000+ miles)
W177 (2018–2025): no misfire history — cylinder head in good condition
Full Mercedes service history with correct MB 229.5 oil spec
DCT7 gearbox fluid changed every 60,000 km

Avoid If

Cold‑start rattle on W176 — timing chain may be failing — walk away
Misfire or limp mode on W177 — cylinder head may be failing — walk away
Poor service history — M270 and M260 engines are sensitive to neglect
Reprogrammed / modified engine — increased risks

Closing Verdict

The A250 is the performance flagship of the regular A‑Class range — a 2.0‑litre turbo that delivers 211–225 bhp and genuine hot‑hatch credentials. The W176's M270 is the more proven engine, but timing chain stretch is a non‑negotiable watchpoint from 70,000 miles. The W177's M260 delivers more power but has a worrying track record of cylinder head failures and cracked valves at relatively low mileage. Buy on full service history, prioritise post‑2014 W176 cars (which had strengthened timing components), and never ignore a cold‑start rattle or misfire.

Don't guess.Get the right engine at the right price.

→ Compare A250 engine prices before you buy

Don't Guess. Compare.

Get real quotes from vetted UK specialists and make the right call for your 320d.

→ Compare A250 engine prices before you buy

20+ Vetted Specialists UK Network

12-Month Warranty as Standard

Nationwide Delivery & Collection

Transparent Pricing, No Hidden Fees

Thousands of 320d Owners Helped

Buying Checklist

Before you buy a used Mercedes A‑Class A250 (or before you commit to an engine replacement), check these:

Cold Start — Listen for rattling; timing chain indicator (M270, W176)

Misfire / Limp Mode — Check for engine management light; cylinder head indicator (M260, W177)

Service History — including which generation (W176 or W177) and confirmed oil‑change intervals (10,000–15,000 km)

Carbon Build-up — Check for rough idle or hesitation; may need walnut blasting

DCT7 Gearbox — Check for jerking or slippage; fluid should be changed every 60,000 km

Turbo Health — Listen for whistling or whining; turbo actuator issues possible

Oil Leaks — Check under the car and around the engine; valve cover gasket leaks are common

MOT History — Check for emissions‑related failures

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

This table's rows match Section 1B's Era Map exactly.

M270DE20LA (2.0 turbo)

Years2013–2018

Power211 bhp (155 kW) @ 5,500 rpm; 350 Nm @ 1,200–4,000 rpm

2025 Enquiries— (pattern data)

Avg. Recon Cost£3,000–£5,500【PLACEHOLDER】

Engine CodeYearsPower2025 EnquiriesAvg. Recon Cost

M270DE20LA (2.0 turbo)2013–2018211 bhp (155 kW) @ 5,500 rpm; 350 Nm @ 1,200–4,000 rpm— (pattern data)£3,000–£5,500【PLACEHOLDER】

M260 (2.0 turbo)2018–2025221–225 bhp (165 kW) @ 5,500 rpm; 350 Nm @ 1,800–4,000 rpm— (pattern data)£4,000–£7,000【PLACEHOLDER】

Technical Specs

M270DE20LA 2.0 turbo, W176

Displacement1,991 cc

Cylinders4‑cylinder inline

Compression Ratio9.8:1

Fuel SystemDirect injection

TurbochargerTwin‑scroll turbocharger

→ Compare A250 engine prices for your Mercedes

Get quotes from trusted UK specialists in minutes.

Market Intelligence

Most Common Failure

W176: timing chain stretch / W177: cylinder head / cracked exhaust valve【PATTERN DATA】

Average Enquiry Mileage

50,000

–70,000 miles【PATTERN DATA】

Average Replacement Cost

£4,500

reconditioned, supply only【PLACEHOLDER — confirm vs cost sheet】

Most Requested Engine Code

M270 / M260【PATTERN DATA】

Peak Enquiry Season

Autumn/Winter — cold starts expose timing chain and misfire issues【PATTERN DATA】

Regional Demand

South East18%

London16%

North West (12%)【PATTERN DATA】

Regional Demand Breakdown

18%South East

16%London

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 A‑Class A250 engine replacement UK drivers rely on. Compare prices from trusted specialists on EnginesMarket today and get back on the road with confidence — from £1,500 for a used unit to £7,800 for a fully rebuilt 2.0‑litre turbo engine.

Compare Mercedes A‑Class A250 Engine Prices Now

100% Free

No hidden fees

No Obligation

Get quotes with zero pressure

UK Specialists

20+ vetted experts

12-Month Warranty

As standard

Nationwide Delivery

Supply & fit available

100% Free

No hidden fees

No Obligation

Get quotes with zero pressure

UK Specialists

20+ vetted experts

12-Month Warranty

As standard

Nationwide Delivery

Supply & fit available