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Mercedes M270 Engine - Replacement Cost, Problems & CompatibilityProblems & Compatibility
The 2.0-litre turbocharged petrol engine fitted to front-wheel-drive Mercedes compact models from 2012 to 2018, including the A-Class, B-Class, CLA, and GLA. Reconditioned Mercedes M270 units are typically available from £3,800 , reflecting consistent specialist demand for this compact platform.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
Used from
£2,000
Reconditioned from
£3,800
Rebuilt from
£5,500
GB
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Quotes only from vetted UK engine specialists.
Key Specs
Mercedes M270 - Specifications at a Glance
Engine Code
M270 (M270.910, M270.920)
Fuel
Petrol
Configuration
2.0L inline-4 turbocharged
Power Output(s)
156hp - 211hp (depending on specific model tune)
Years Produced
2012-2018
UK Models Fitted
4 Mercedes models - full list in Compatibility below
Replaced
M266 / M271
Replaced By
M260 / M282
Most Common Failure
Timing chain stretch and camshaft adjuster oil leaks
Reconditioned Price Range
£3,800-£6,500 supply-only
Vetted UK specialists for M270 replacements
Minimum 12-month warranty on reconditioned and rebuilt options
Fitted To
Which Mercedes Models Use the M270-
TAG: Fitted To
| Model | Generation/Chassis | Badge(s) | Years | Link |
|---|---|---|---|---|
 Mercedes-Benz A-Class | W176 | A200, A250 | 2012-2018 | |
| Mercedes-Benz B-Class | W246 | B200, B250 | 2012-2018 | |
| Mercedes-Benz CLA | C117 / X117 | CLA200, CLA250 | 2013-2019 | |
| Mercedes-Benz GLA | X156 | GLA200, GLA250 | 2013-2019 |
02
Mercedes-Benz B-Class
03
Mercedes-Benz CLA
04
Mercedes-Benz GLA
CROSS-BRAND
M270 is documented across 4 BMW applications spanning A-Class, B-Class, CLA, GLA. Registration lookup confirms the exact suffix before quotes are sent.
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Prices
Mercedes M270 Engine Replacement Cost (UK)
Condition | Supply Only | Fitted (Independent Specialist) | Typical Warranty |
|---|---|---|---|
Used | £2,000-£3,800 | £2,650-£4,710 | 3-6 months |
Reconditioned | £3,800-£6,500 | £4,450-£7,410 | 12-24 months |
Rebuilt | £5,500-£8,500 | £6,150-£9,410 | 12-24 months |
The final cost of a Mercedes M270 engine replacement is heavily influenced by the condition of the turbocharger and the history of the timing chain. If the chain has stretched and caused internal valve damage, or if the turbo wastegate has failed and contaminated the oil system, a standard reconditioned swap may not suffice, pushing the requirement toward a fully rebuilt unit. See our full reconditioned engine cost guide for a detailed breakdown of what is included at each price tier.
Labour Guide
Fitting a Mercedes M270 typically takes 8-12 hours at £65/hr (independent specialist rate) - confirm exact labour when comparing quotes.
Price Factors
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Common Problems
Mercedes M270 Engine Problems - What Actually Fails
Every engine has its weak points. Here are the known issues with the M270, based on real-world data and verified failure patterns.
Verified issue focus: Timing chain stretch and camshaft adjuster oil leaks.
1. Timing Chain Stretch and Tensioner Wear
1. Timing Chain Stretch and Tensioner Wear
Typical onset:
60,000-100,000 miles
What happens:
Early production M270 units are prone to timing chain stretch, leading to a distinct metallic rattling noise on cold starts and potential check engine lights indicating camshaft correlation errors. If ignored, the chain can skip teeth, causing catastrophic valve and piston interference.
Repair vs replace:
If caught early, a timing chain kit and tensioner replacement is viable. However, if the chain has already snapped or caused secondary internal damage, a full Mercedes M270 engine replacement is the only reliable solution.
Read more about this issue
2. Camshaft Adjuster Oil Leaks and Turbo Wastegate Rattle
2. Camshaft Adjuster Oil Leaks and Turbo Wastegate Rattle
Typical onset:
50,000-90,000 miles
What happens:
The camshaft adjuster solenoids and valve cover gaskets can develop oil leaks, leading to low oil levels and potential engine damage if left unattended. Additionally, the turbocharger wastegate actuator can develop a rattle or fail, causing boost pressure faults and reduced performance.
Repair vs replace:
Solenoids and gaskets are relatively inexpensive to replace as preventative maintenance. A failed turbocharger requires replacement or rebuilding, and if oil starvation has occurred due to leaks, a full engine rebuild may be necessary to address scored cylinder walls.
Read more about this issue
Compare rebuilt M270 prices with the failure already addressed
Engine Variants
How to Confirm You Have the Mercedes M270
The M270 engine code (including sub-codes M270.910 and M270.920) is stamped directly onto the engine block, typically near the bell housing or oil filter housing, and is clearly listed on your vehicle's V5C registration document under "Engine Number". Common Confusion Warning: Owners frequently confuse the M270 with the closely related M274. While they share the same 2.0-litre turbocharged architecture and internal components, the M270 is mounted transversely for front-wheel-drive compact models (A-Class, B-Class, CLA, GLA), whereas the M274 is mounted longitudinally for rear-wheel-drive platforms (C-Class, E-Class). Fitting an M274 as a replacement for an M270 will result in severe mounting, exhaust, and wiring loom incompatibilities.
Not 100% sure- Enter your registration above - we'll confirm your exact M270 fitment before any quotes are sent.
Easily Confused
M271
- The longitudinal predecessor it replaced, which shares similar timing chain and balance shaft vulnerabilities but differs entirely in mounting orientation and accessory layout.
Alternative / Next-Gen Code
M260
- The newer modular successor that dropped the transverse 2.0L layout in favour of a lighter 1.3L/1.4L configuration for compact models, though some late M270 applications overlapped with early M282 introductions.
Related JLR Variants
M274
- The longitudinal twin of this engine; owners of rear-wheel-drive C-Class or E-Class models with similar symptoms should look here instead, as the M274 is not a direct physical swap for the transverse M270.
Confirm the exact M270 fitment
Not 100% sure- Enter your registration above - we'll confirm your exact M270 fitment before any quotes are sent.
Buying Guide
Buying a Replacement Mercedes M270 - What to Choose
Choosing the right replacement route depends on your budget, risk tolerance, and ownership goals. Here's a breakdown of your options.
Used:
A used Mercedes M270 is only advisable for lower-mileage host vehicles and *only* if accompanied by a full service history proving the timing chain has been inspected and replaced if necessary. Without this history, the risk of inheriting the same stretch or oil leak issues is unacceptably high.
Reconditioned:
This is the most recommended route for the M270. A proper reconditioned unit will include a brand-new timing chain kit, updated tensioner, refreshed camshaft adjuster seals, and a tested turbocharger, directly addressing the engine's known weak points out of the box.
Rebuilt:
A full rebuild is justified if your original M270 suffered catastrophic timing chain failure that damaged the cylinder head, valves, or pistons. A specialist rebuild will machine the block, fit updated chain components, and upgrade all lubrication pathways to prevent a repeat failure.
Supply & Fit Line:
Sourcing a replacement is only half the job. Our network provides full supply and fit services, ensuring the engine is installed by Mercedes-specialist technicians with a nationwide warranty backing both the labour and the unit.
Vehicle Value Note:
For compact hosts like the W176 A-Class or W246 B-Class, current UK market values typically sit between £4,000 and £12,000. With a reconditioned M270 replacement costing from £3,800 (plus fitting), the repair cost can approach 50-80% of the vehicle's value on older or higher-mileage examples. Always evaluate the car's scrap or part-exchange value before committing to a full engine replacement on sub-£6,000 hosts.
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Related Engines
Engines Related to the Mercedes M270
Explore engines that are closely related to the Mercedes-Benz M270, including its predecessor, successor, and key family variants.
Predecessor
M271
- The longitudinal predecessor it replaced, which shares similar timing chain and balance shaft vulnerabilities but differs entirely in mounting orientation and accessory layout.
Successor
M260
- The newer modular successor that dropped the transverse 2.0L layout in favour of a lighter 1.3L/1.4L configuration for compact models, though some late M270 applications overlapped with early M282 introductions.
Sibling
M274
- The longitudinal twin of this engine; owners of rear-wheel-drive C-Class or E-Class models with similar symptoms should look here instead, as the M274 is not a direct physical swap for the transverse M270.
FAQ
Mercedes M270Frequently Asked Questions
Question 1How much does a Mercedes M270 engine replacement cost in the UK-
A Mercedes M270 engine replacement typically costs between £3,800 and £6,500 for a reconditioned supply-only unit . Fitted costs generally add £650-£910 for independent specialist labour, and fully rebuilt units with upgraded components can reach £5,500-£8,500 supply-only. Compare M270 engine replacement quotes from vetted UK specialists.
Compare M270 quotesQuestion 2What is the most common failure with the Mercedes M270 engine-
The most documented failure pattern for the M270 is timing chain stretch and tensioner wear, particularly in early production units, leading to cold-start rattling and potential check engine lights. Additionally, camshaft adjuster oil leaks and turbo wastegate rattles are common secondary issues that can lead to oil starvation or boost faults if ignored. Get quotes for a rebuilt M270 with these known weaknesses addressed.
Compare M270 quotesQuestion 3Which Mercedes models use the M270 engine-
The M270 is fitted to Mercedes-Benz front-wheel-drive compact models from 2012 to 2018, including the A-Class (W176), B-Class (W246), CLA (C117/X117), and GLA (X156). It powers badges ranging from the A200 and A250 to the GLA200 and GLA250, and you should always verify your exact fitment via registration lookup. Confirm your exact M270 fitment before requesting a quote.
Compare M270 quotesQuestion 4Should I buy a used or reconditioned Mercedes M270 engine-
A reconditioned Mercedes M270 is strongly recommended over a used unit due to the known timing chain stretch and oil leak risks. Used units carry a high risk of inheriting the same latent defects unless accompanied by stamped proof of preventative chain replacement, whereas reconditioned units include updated chain kits, tensioners, and revised seals, providing a reliable long-term solution. View our reconditioned Mercedes M270 engine options with 12-month warranties.
Compare M270 quotesQuestion 5How do I know if my car has the M270 and not the M274-
The M270 engine code (including sub-codes M270.910 and M270.920) is stamped on the engine block near the bell housing or oil filter housing and is listed on your V5C registration document. It is commonly confused with the M274, but the M270 is mounted transversely for front-wheel-drive models, meaning fitting an M274 will result in severe mounting, exhaust, and wiring loom incompatibilities. Enter your registration above to confirm your exact M270 engine code.
Compare M270 quotesCompare Mercedes M270 Engine Prices Today
Get a free, no-obligation comparison for your exact Mercedes M270 engine code and sub-code. Our registration lookup confirms your precise fitment before any quotes are sent, ensuring you receive accurate pricing for your specific vehicle. With reconditioned M270 units starting from an estimated £3,800, comparing specialist quotes takes just two minutes and could save you hundreds on your replacement.
Vetted UK Specialists
Vetted UK specialists for M270 replacements
Minimum 12-Month Warranty
Minimum 12-month warranty on reconditioned and rebuilt options
Nationwide Delivery
Nationwide delivery plus supply and fit availability
Expert Support
Secure enquiry - no spam. Quotes only from vetted UK engine specialists.
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