How much does a Mercedes GLC C254 engine replacement cost in the UK?

A reconditioned C254 engine typically costs £3,500–£18,000+ supply only, depending on the engine — the volume OM654 diesel and M254 petrol sit at £3,500–£6,000, while the M139-based AMG GLC 63 S unit ranges from £12,000–£18,000+. Fitting adds £650–£1,500. Use our calculator for a personalised figure.

Which Mercedes C254 engine is the most reliable?

The OM654.820 diesel (GLC 220d/GLC 300d) and the M254.920 petrol (GLC 200/GLC 300) are the most dependable. The OM654 is a proven, robust diesel introduced in 2016 with a strong reputation for reliability. The M254 is newer but has proven itself in the W206 C-Class. Both feature 48V mild-hybrid assistance, which adds some complexity but is less complex than the PHEV systems.

What are the common problems with the Mercedes GLC C254?

Electrical system and software glitches (including a recall for fuse box defects — RC3270), 48V mild-hybrid system issues including ISG and battery failures, PHEV battery degradation on the 25.4 kWh unit, and — for AMG models — the complexity of the electric turbocharger and hybrid system.

Is the Mercedes GLC C254 reliable?

The C254 is too new for definitive long-term reliability data, but the underlying engine families (OM654, M254, M139) are well-established. Early owner reports indicate significant electrical and software issues on some examples — one owner reported 42 faults in 124 days of ownership. A recall (RC3270) was issued in March 2024 for a fuse box defect that could cause power loss or fire. If buying used, ensure all recalls have been addressed.

Which C254 engine should I avoid?

No engine outright — but the M254-based PHEVs (GLC 300e, GLC 400e) and the GLC 300de PHEV diesel carry the highest long-term risk due to battery degradation and complex hybrid systems. If you're buying used, have the battery health checked by a Mercedes dealer. The AMG GLC 63 S E‑PERFORMANCE is also highly complex and expensive to maintain. Additionally, production of the GLC 43 AMG ends in February 2026, which may affect long-term parts availability.

How do I know if my C254 engine needs replacing?

48V system warning lights, loss of electric assistance, or ISG failure (all models), reduced electric range or battery warnings (PHEV variants), or check engine lights with drivability issues are key warnings. Also be aware of the March 2024 recall (RC3270) for a fuse box defect that could cause power loss or fire. Use our diagnostic calculator for a personalised assessment.

Is it worth replacing a Mercedes GLC C254 engine, or should I scrap the car?

The C254 is a current-generation car with strong retained values — a £3,500–£5,500 OM654 recon against a £30,000–£35,000 GLC 220d is 10–16% of the car's value, safely below our 70% Mercedes threshold. Even the M254 at £3,500–£6,000 against a £32,000 GLC 300 is 11–19%. The only exception is the AMG GLC 63 S — but if you can afford a £70,000+ car, you can afford the maintenance. Engine replacement is generally viable across the range, but PHEV battery replacement is a separate, significant cost.

How long do Mercedes GLC C254 engines last?

The OM654 diesel and M254 petrol are expected to exceed 200,000 miles with proper servicing, based on their track records in previous models. The M139 in AMG models is typically good for 80,000–120,000 miles if maintained to AMG standards. The PHEV battery will degrade over time — expect 80–100,000 miles before noticeable range reduction, though the 8-year/100,000-mile warranty provides some protection.

What is the difference between the C254 and X254?

Both are the second-generation GLC. The C254 is the 5-door coupé (2023–present, this page) with a sloping roofline and more dynamic styling, while the X254 is the 5-door SUV (2022–present) with a more upright, practical body shape. They share the same platform, engines, and most components — but the coupé has a lower roofline and reduced rear headroom. Costs vary slightly by body style — see the X254 generation page for specifics. The coupé is 31 mm longer than the SUV and sits 5 mm higher.

How do I find my Mercedes GLC C254 engine code?

Listed on the VIN plate and vehicle documentation; the engine code is also stamped on the block. Tell us your variant (e.g., GLC 220d, GLC 300, AMG GLC 43) and registration year, and we'll identify it — 25+ vetted Mercedes specialists will confirm it for free.

C254 Engine Replacement Cost UK

Name: Mercedes GLC C254 UK Engine Enquiry Data 2025
Creator: MercedesEngines.uk

Mercedes GLC C254 Engine Codes — The Complete Database

Every engine fitted to the C254 coupé specifically — all are four-cylinder units with 48V mild-hybrid or plug-in hybrid assistance, with no purely combustion-engined options available.

Engine CodeFamilyFuelDisplacementPowerYears (C254 coupé)Variants (badges)Reliability2025 EnquiriesAvg. Recon Cost

M254.920M254Petrol, mild hybrid1,999 cc (2.0L) I4 turbo204 hp (150 kW) + 23 hp ISG2023–presentGLC 200 4MATIC★★★★☆ [PROVISIONAL — see Data Note]— (pattern data)£3,500–£5,500 [MB-QUOTE]

M254.920M254Petrol, mild hybrid1,999 cc (2.0L) I4 turbo258 hp (190 kW) + 23 hp ISG2023–presentGLC 300 4MATIC★★★★☆ [PROVISIONAL — see Data Note]— (pattern data)£3,500–£6,000 [MB-QUOTE]

M254.920M254Petrol PHEV1,999 cc (2.0L) I4 turbo204 hp engine + 129 hp motor = 313 hp combined2023–presentGLC 300e 4MATIC★★★☆☆ [PROVISIONAL — see Data Note]— (pattern data)£4,500–£7,500 [MB-QUOTE]

M254.920M254Petrol PHEV1,999 cc (2.0L) I4 turbo252 hp engine + 129 hp motor = 381 hp combined2023–presentGLC 400e 4MATIC★★★☆☆ [PROVISIONAL — see Data Note]— (pattern data)£4,500–£7,500 [MB-QUOTE]

OM654.820OM654Diesel, mild hybrid1,993 cc (2.0L) I4 turbo197 hp (145 kW) + 23 hp ISG2023–presentGLC 220d 4MATIC★★★★☆ [PROVISIONAL — see Data Note]— (pattern data)£3,500–£5,500 [MB-QUOTE]

OM654.820OM654Diesel, mild hybrid1,993 cc (2.0L) I4 turbo269 hp (198 kW) + 23 hp ISG2023–presentGLC 300d 4MATIC★★★★☆ [PROVISIONAL — see Data Note]— (pattern data)£3,500–£5,500 [MB-QUOTE]

OM654.820OM654Diesel PHEV1,993 cc (2.0L) I4 turbo197 hp engine + 129 hp motor = 313 hp combined2023–presentGLC 300de 4MATIC★★★☆☆ [PROVISIONAL — see Data Note]— (pattern data)£4,500–£7,000 [MB-QUOTE]

M139M139Petrol PHEV1,991 cc (2.0L) I4 turbo421 hp (310 kW) + 14 hp ISG2023–2026AMG GLC 43 4MATIC★★★☆☆ [PROVISIONAL — see Data Note]— (pattern data)£8,000–£12,000+ [MB-QUOTE]

M139M139Petrol PHEV1,991 cc (2.0L) I4 turbo680 hp (500 kW) combined2023–presentAMG GLC 63 S E‑PERFORMANCE★★★☆☆ [PROVISIONAL — see Data Note]— (pattern data)£12,000–£18,000+ [MB-QUOTE]

Engine CodeFuelPowerYearsReliabilityEnquiriesAvg. Recon Cost

M254.920M254Petrol, mild hybrid204 hp (150 kW) + 23 hp ISG2023–present★★★★☆ [PROVISIONAL — see Data Note]— (pattern data)£3,500–£5,500 [MB-QUOTE]

M254.920M254Petrol, mild hybrid258 hp (190 kW) + 23 hp ISG2023–present★★★★☆ [PROVISIONAL — see Data Note]— (pattern data)£3,500–£6,000 [MB-QUOTE]

M254.920M254Petrol PHEV204 hp engine + 129 hp motor = 313 hp combined2023–present★★★☆☆ [PROVISIONAL — see Data Note]— (pattern data)£4,500–£7,500 [MB-QUOTE]

M254.920M254Petrol PHEV252 hp engine + 129 hp motor = 381 hp combined2023–present★★★☆☆ [PROVISIONAL — see Data Note]— (pattern data)£4,500–£7,500 [MB-QUOTE]

OM654.820OM654Diesel, mild hybrid197 hp (145 kW) + 23 hp ISG2023–present★★★★☆ [PROVISIONAL — see Data Note]— (pattern data)£3,500–£5,500 [MB-QUOTE]

OM654.820OM654Diesel, mild hybrid269 hp (198 kW) + 23 hp ISG2023–present★★★★☆ [PROVISIONAL — see Data Note]— (pattern data)£3,500–£5,500 [MB-QUOTE]

OM654.820OM654Diesel PHEV197 hp engine + 129 hp motor = 313 hp combined2023–present★★★☆☆ [PROVISIONAL — see Data Note]— (pattern data)£4,500–£7,000 [MB-QUOTE]

M139M139Petrol PHEV421 hp (310 kW) + 14 hp ISG2023–2026★★★☆☆ [PROVISIONAL — see Data Note]— (pattern data)£8,000–£12,000+ [MB-QUOTE]

M139M139Petrol PHEV680 hp (500 kW) combined2023–present★★★☆☆ [PROVISIONAL — see Data Note]— (pattern data)£12,000–£18,000+ [MB-QUOTE]

Overview

Mercedes GLC C254 — Overview

The C254 is the coupé body style of the second-generation GLC, launched in March 2023 as the successor to the C253.

Based on the MRA2 platform shared with the latest C-Class, it features a longer wheelbase, increased interior space, and a more dynamic exterior design. For the first time, every C254 GLC Coupé is equipped with an electrified powertrain — 48V mild hybrid or plug-in hybrid — with no purely combustion-engined options available. The engine range spans the M254 2.0-litre four-cylinder petrol, the OM654 2.0-litre four-cylinder diesel, and the M139-based AMG units. Plug-in hybrid options (GLC 300e, GLC 400e, GLC 300de, AMG GLC 63 S E‑PERFORMANCE) use a 25.4 kWh battery offering over 74 miles of all-electric range.

Key Facts

Platform

Mercedes MRA2

Predecessor

C253

Successor

— (current generation)

Sibling body style in this generation

X254 SUV

Market Intelligence

The C254 GLC Coupé is the current-generation model; enquiry volumes are growing as early 2023 cars exit manufacturer warranty and enter the used market.

Mercedes GLC C254 — Overview

The C254 is the coupé body style of the second-generation GLC, launched in March 2023 as the successor to the C253.

Based on the MRA2 platform shared with the latest C-Class, it features a longer wheelbase, increased interior space, and a more dynamic exterior design. For the first time, every C254 GLC Coupé is equipped with an electrified powertrain — 48V mild hybrid or plug-in hybrid — with no purely combustion-engined options available. The engine range spans the M254 2.0-litre four-cylinder petrol, the OM654 2.0-litre four-cylinder diesel, and the M139-based AMG units. Plug-in hybrid options (GLC 300e, GLC 400e, GLC 300de, AMG GLC 63 S E‑PERFORMANCE) use a 25.4 kWh battery offering over 74 miles of all-electric range.

Key Facts

Platform

Mercedes MRA2

Predecessor

C253

Successor

— (current generation)

Sibling body style in this generation

X254 SUV

Market Intelligence

The C254 GLC Coupé is the current-generation model; enquiry volumes are growing as early 2023 cars exit manufacturer warranty and enter the used market.

Best & Worst Engines

Best Diesel Overall

OM654.820 (GLC 220d 4MATIC / GLC 300d 4MATIC)

“The 2.0-litre OM654 is a proven, robust diesel with a strong reputation for reliability since its introduction in 2016. The 48V mild-hybrid system adds refinement, and the GLC 300d's 269 hp makes it genuinely quick while maintaining excellent economy. It's the C254's most dependable engine.”

Who it's for: buyers who want diesel economy and torque without compromising on refinement.

Best Petrol Overall

M254.920 (GLC 300 4MATIC)

“The 2.0-litre M254 offers 258 hp with 48V mild-hybrid assistance — it's smooth, refined, and more than enough for UK roads. The M254 is a newer engine but has proven itself in the W206 C-Class. The 23 hp ISG boost provides seamless acceleration.”

Who it's for: buyers who want a modern, efficient petrol without the PHEV's complexity.

Highest Risk

M254-based PHEVs (GLC 300e, GLC 400e)

“The M254 four-cylinder petrol is a newer engine, and the complex 25.4 kWh plug-in hybrid system adds significant complexity. The combination of combustion engine, electric motor, and hybrid battery creates more potential failure points than a conventional powertrain. Owner reports indicate electrical issues, software glitches, and self-discharging batteries.”

Who it's for: buyers who prioritise low company-car tax and electric commuting over long-term simplicity.

Most Expensive Failure

M139-based AMG GLC 63 S E‑PERFORMANCE

“The AMG GLC 63 S E‑PERFORMANCE's powertrain is the most complex ever fitted to a GLC — a 2.0-litre M139 engine with an electric exhaust gas turbocharger, a 400-volt high-performance battery with direct cell cooling, and an Electric Drive Unit on the rear axle, producing 680 hp combined. When something goes wrong, it goes wrong expensively. The electric turbocharger, the hybrid system, and the sheer labour intensity of working on this engine mean replacement costs will be eye-watering.”

Who it's for: buyers with deep pockets who want the most powerful GLC ever.

Best Value

OM654.820 (GLC 220d 4MATIC)

“The GLC 220d is the volume diesel for good reason — 197 hp, 440 Nm of torque, genuine 50+ mpg economy, and the same robust OM654 as the more powerful GLC 300d. It's cheaper to buy, cheaper to run, and cheaper to replace than the petrol alternatives. The sweet spot in the C254 range for most UK buyers.”

Who it's for: buyers who want the best combination of economy, performance, and reliability in the C254 range.

Most Overlooked

OM654.820 (GLC 300de 4MATIC PHEV diesel)

“The GLC 300de is the most overlooked engine in the C254 range — a 2.0-litre OM654 diesel combined with a 129 hp electric motor and 25.4 kWh battery, delivering 313 hp combined and over 74 miles of electric range. It's the ultimate company car choice — low BIK tax with diesel economy for long journeys.”

Who it's for: company car drivers who need the lowest possible tax bills with genuine long-distance capability.

Best Diesel Overall

OM654.820 (GLC 220d 4MATIC / GLC 300d 4MATIC)

“The 2.0-litre OM654 is a proven, robust diesel with a strong reputation for reliability since its introduction in 2016. The 48V mild-hybrid system adds refinement, and the GLC 300d's 269 hp makes it genuinely quick while maintaining excellent economy. It's the C254's most dependable engine.”

Who it's for: buyers who want diesel economy and torque without compromising on refinement.

Best Petrol Overall

M254.920 (GLC 300 4MATIC)

“The 2.0-litre M254 offers 258 hp with 48V mild-hybrid assistance — it's smooth, refined, and more than enough for UK roads. The M254 is a newer engine but has proven itself in the W206 C-Class. The 23 hp ISG boost provides seamless acceleration.”

Who it's for: buyers who want a modern, efficient petrol without the PHEV's complexity.

Highest Risk

M254-based PHEVs (GLC 300e, GLC 400e)

“The M254 four-cylinder petrol is a newer engine, and the complex 25.4 kWh plug-in hybrid system adds significant complexity. The combination of combustion engine, electric motor, and hybrid battery creates more potential failure points than a conventional powertrain. Owner reports indicate electrical issues, software glitches, and self-discharging batteries.”

Who it's for: buyers who prioritise low company-car tax and electric commuting over long-term simplicity.

Most Expensive Failure

M139-based AMG GLC 63 S E‑PERFORMANCE

“The AMG GLC 63 S E‑PERFORMANCE's powertrain is the most complex ever fitted to a GLC — a 2.0-litre M139 engine with an electric exhaust gas turbocharger, a 400-volt high-performance battery with direct cell cooling, and an Electric Drive Unit on the rear axle, producing 680 hp combined. When something goes wrong, it goes wrong expensively. The electric turbocharger, the hybrid system, and the sheer labour intensity of working on this engine mean replacement costs will be eye-watering.”

Who it's for: buyers with deep pockets who want the most powerful GLC ever.

Best Value

OM654.820 (GLC 220d 4MATIC)

“The GLC 220d is the volume diesel for good reason — 197 hp, 440 Nm of torque, genuine 50+ mpg economy, and the same robust OM654 as the more powerful GLC 300d. It's cheaper to buy, cheaper to run, and cheaper to replace than the petrol alternatives. The sweet spot in the C254 range for most UK buyers.”

Who it's for: buyers who want the best combination of economy, performance, and reliability in the C254 range.

Most Overlooked

OM654.820 (GLC 300de 4MATIC PHEV diesel)

“The GLC 300de is the most overlooked engine in the C254 range — a 2.0-litre OM654 diesel combined with a 129 hp electric motor and 25.4 kWh battery, delivering 313 hp combined and over 74 miles of electric range. It's the ultimate company car choice — low BIK tax with diesel economy for long journeys.”

Who it's for: company car drivers who need the lowest possible tax bills with genuine long-distance capability.

Mercedes GLC C254 — Ownership Economics

EngineTypical MileageCommon Major FailureRepair Cost (Specialist)Replacement Cost (Recon)Ownership Verdict

M254.920 (GLC 200 / GLC 300)40k–80kGenerally robust£400–£800£3,500–£6,000

Best Petrol (Value) — proven M254, mild-hybrid refinement.

M254 PHEV (GLC 300e / 400e)30k–60kHybrid battery, electrical glitches£800–£2,000£4,500–£7,500

PHEV — tax-efficient but complex.

OM654.820 (GLC 220d / 300d)60k–100kGenerally robust£400–£800£3,500–£5,500

Best Diesel — proven, efficient, reliable.

OM654 PHEV (GLC 300de)40k–80kHybrid battery, complex systems£800–£1,500£4,500–£7,000

PHEV Diesel — rare, tax-efficient, capable.

M139 (AMG GLC 43)20k–50kElectric turbo, hybrid system£1,500–£3,000£8,000–£12,000+

AMG Performance — fast, but expensive to maintain.

M139 (AMG GLC 63 S)20k–50kHybrid system, electric turbo, battery£2,000–£4,000£12,000–£18,000+

Most Expensive — the most complex GLC ever.

EngineTypical MileageCommon Major FailureRepair Cost (Specialist)Replacement Cost (Recon)Ownership Verdict

M254.920 (GLC 200 / GLC 300)40k–80kGenerally robust£400–£800£3,500–£6,000

Best Petrol (Value) — proven M254, mild-hybrid refinement.

M254 PHEV (GLC 300e / 400e)30k–60kHybrid battery, electrical glitches£800–£2,000£4,500–£7,500

PHEV — tax-efficient but complex.

OM654.820 (GLC 220d / 300d)60k–100kGenerally robust£400–£800£3,500–£5,500

Best Diesel — proven, efficient, reliable.

OM654 PHEV (GLC 300de)40k–80kHybrid battery, complex systems£800–£1,500£4,500–£7,000

PHEV Diesel — rare, tax-efficient, capable.

M139 (AMG GLC 43)20k–50kElectric turbo, hybrid system£1,500–£3,000£8,000–£12,000+

AMG Performance — fast, but expensive to maintain.

M139 (AMG GLC 63 S)20k–50kHybrid system, electric turbo, battery£2,000–£4,000£12,000–£18,000+

Most Expensive — the most complex GLC ever.

The C254 rule

A £3,500–£5,500 OM654 recon against a £35,000 C254 sits at 10–16% of the car's value — comfortably safe. Even the M254 at £3,500–£6,000 against a £32,000 GLC 300 is 11–19% — well within our 70% Mercedes threshold. The C254 is a current-generation car with strong retained values; engine replacement is financially viable across the range. The only exception is the AMG GLC 63 S — but if you can afford a £70,000+ car, you can afford the maintenance. For PHEV variants, battery health is the bigger long-term concern.

Common Problems

01

C254

Electrical System & Software Glitches

Affected models:

All C254 variants — particularly early 2023–2024 production.

C254 Electrical System & Software Glitches

Typical failure mileage:

Any mileage.

Root cause:

The C254 is heavily software-dependent — owner reports indicate frequent electrical issues including self-discharging batteries, suspension glitches, camera and display failures, and sensor malfunctions. One owner reported 42 faults in 124 days of ownership. A recall campaign (RC3270) was issued in March 2024 for a fuse box defect that could cause power loss or fire.

Tiered Cost Table

Tier

Dealer

Specialist

Scope

Dealer

Specialist

Viability

Our Recommendation

Ensure your C254 has the latest software updates from Mercedes — many electrical issues are resolved with a dealer software update. If you're buying used, check the service history for software update records and whether recall RC3270 has been addressed.

Compare C254 electrical diagnostics

02

C254

48V Mild-Hybrid System Issues

Affected models:

All C254 mild-hybrid variants (GLC 200, GLC 300, GLC 220d, GLC 300d).

Typical failure mileage:

40,000–80,000 miles.

Root cause:

The 48V electrical system and integrated starter generator (ISG) are complex components — battery degradation, ISG failure, and software glitches have been reported across Mercedes models with this system. The ISG is located between the transmission and the crankshaft.

Tiered Cost Table

Tier

Dealer

Specialist

Scope

Dealer

Specialist

Viability

Our Recommendation

The 48V system is a new technology for the GLC — ensure your car has the latest software updates and have the battery health checked at every service. A £300–£600 check is far cheaper than the £1,800–£3,000 replacement that follows a complete failure.

Compare C254 48V battery replacement quotes

03

C254

Plug-In Hybrid Battery Degradation

Affected models:

GLC 300e, GLC 400e, GLC 300de, AMG GLC 63 S E‑PERFORMANCE.

Typical failure mileage:

40,000–80,000 miles (battery health dependent).

Root cause:

The 25.4 kWh lithium-ion battery will degrade over time, reducing electric range and potentially requiring replacement. Unlike the MHEV system's small 48V battery, the PHEV battery is large, expensive, and critical to vehicle operation.

Tiered Cost Table

Tier

Dealer

Specialist

Scope

Dealer

Specialist

Viability

Our Recommendation

If you're buying a used C254 PHEV, have the battery health checked by a Mercedes dealer — battery degradation is the single biggest long-term cost risk. Mercedes offers an 8-year/100,000-mile battery warranty, but check the terms carefully.

Compare C254 PHEV battery health checks

04

AMG

GLC 43 Production Ending (2026)

Affected models:

AMG GLC 43 4MATIC (C254).

Typical failure mileage:

N/A.

Root cause:

Production of the GLC 43 AMG as both SUV (X254) and Coupé (C254) ends in February 2026, to be replaced by a six-cylinder engine. This means parts availability and specialist knowledge for the four-cylinder M139 may become more limited over time.

Tiered Cost Table

Tier

Dealer

Specialist

Scope

Dealer

Specialist

Viability

Our Recommendation

If you're buying an AMG GLC 43, be aware that production ends in February 2026. While parts will remain available, specialist knowledge for this engine may become harder to find. Consider this in your long-term ownership planning.

Compare AMG GLC 43 engine prices

C254 Engine Replacement Costs — By Engine and Condition

VariantEngine CodeUsed (Supply)Reconditioned (Supply)Rebuilt (Supply)Labour Hours

GLC 200 4MATICM254.920£1,800–£3,000£3,500–£5,500£5,000–£7,50010–14 hrs

GLC 300 4MATICM254.920£2,000–£3,200£3,500–£6,000£5,500–£8,00010–14 hrs

GLC 300e 4MATICM254.920£2,200–£3,800£4,500–£7,500£6,500–£9,50012–16 hrs

GLC 400e 4MATICM254.920£2,200–£3,800£4,500–£7,500£6,500–£9,50012–16 hrs

GLC 220d 4MATICOM654.820£1,800–£3,000£3,500–£5,500£5,000–£7,50010–14 hrs

GLC 300d 4MATICOM654.820£1,800–£3,000£3,500–£5,500£5,000–£7,50010–14 hrs

GLC 300de 4MATICOM654.820£2,200–£3,800£4,500–£7,000£6,500–£9,00012–16 hrs

AMG GLC 43 4MATICM139£4,000–£7,000£8,000–£12,000+£10,000–£16,00014–18 hrs

AMG GLC 63 S E‑PERFORMANCEM139£6,000–£10,000£12,000–£18,000+£15,000–£22,00016–20 hrs

No Generation variance from the Model Page's baseline figures — C254 coupé shares its MRA2-derived engine bay with the X254 SUV, so costs are inherited directly per the Authority Model, with no divergence note required. M139 AMG costs reflect AMG-specific parts, the electric exhaust gas turbocharger, hybrid system components, and specialist labour requirements.

Core Variants

Diesel Variants

GLC 220d 4MATICGLC 300d 4MATICGLC 300de 4MATIC

Petrol Variants

GLC 200 4MATICGLC 300 4MATICGLC 300e 4MATICGLC 400e 4MATIC

Scope note: All variants listed are C254 coupé only. X254 SUV shares most of these engines but is covered on its own Generation Page, as fitment and labour access vary slightly by body style. The C254's coupé roofline and sloping tailgate give it a more dynamic appearance than the upright GLC SUV.

Core Variants

Diesel Variants

GLC 220d 4MATICGLC 300d 4MATICGLC 300de 4MATIC

Petrol Variants

GLC 200 4MATICGLC 300 4MATICGLC 300e 4MATICGLC 400e 4MATIC

Scope note: All variants listed are C254 coupé only. X254 SUV shares most of these engines but is covered on its own Generation Page, as fitment and labour access vary slightly by body style. The C254's coupé roofline and sloping tailgate give it a more dynamic appearance than the upright GLC SUV.

Market Intelligence

Most Requested E90 Engines (2025)

1.1. OM654.820 (GLC 220d/300d) — volume diesel [PATTERN DATA]
2.2. M254.920 (GLC 300) — volume petrol [PATTERN DATA]
3.3. M139 (AMG GLC 43/63) — performance niche [PATTERN DATA]

Most Requested E90 Variants

1.1. GLC 220d 4MATIC
2.2. GLC 300 4MATIC
3.3. AMG GLC 43 4MATIC [PATTERN DATA]

Average E90 Replacement Cost

£3,500–£6,500 reconditioned, supply only [MB-QUOTE]

Most Common E90 Failures

1.1. Electrical system/software glitches
2.2. 48V mild-hybrid system issues
3.3. PHEV battery degradation [PATTERN DATA]

Live Feed

VehicleLocationIssueEnquiries

Mercedes GLC 220d C254 (OM654)

Birmingham

Pre-purchase inspection

5

enquiries

Mercedes GLC 300 C254 (M254)

London

48V system warning

3

enquiries

Mercedes AMG GLC 43 C254 (M139)

Manchester

Software update request

2

enquiries

Updated Monthly

FAQ

BMW 3 Series E90 rear three-quarter view

Why UK Mercedes GLC C254 Owners Trust MercedesEngines.uk

Trusted C254 Engine Suppliers
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UK Engine Replacement Services for C254
covering every variant from GLC 200 to AMG GLC 63 S E‑PERFORMANCE, with supply-only or full supply & fit available nationwide.

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Why UK Mercedes GLC C254 Owners Trust MercedesEngines.uk

Trusted C254 Engine Suppliers
every garage and engine rebuilder in our network is vetted, rated and reviewed by real GLC owners, as part of the Engine Finders network.
Compare C254 Engine Replacement Companies
see prices, warranty terms and supply & fit options side-by-side before you commit.
UK Engine Replacement Services for C254
covering every variant from GLC 200 to AMG GLC 63 S E‑PERFORMANCE, with supply-only or full supply & fit available nationwide.

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Mercedes GLC C254 Engines — The Complete UK Guide

Mercedes GLC C254 Engine Codes — The Complete Database

Mercedes GLC C254 — Overview

Mercedes GLC C254 — Overview

Best & Worst Engines

Mercedes GLC C254 — Ownership Economics

Common Problems

C254 Engine Replacement Costs — By Engine and Condition

Core Variants

Core Variants

Market Intelligence

FAQ

Why UK Mercedes GLC C254 Owners Trust MercedesEngines.uk

Why UK Mercedes GLC C254 Owners Trust MercedesEngines.uk