Mercedes Benz GLE Class 500/580 Engine ReplacementCompare Prices & Get Quotes
Get quotes today from trusted UK Mercedes Benz GLE Class 500 and 580 V8 engine specialists. Compare prices on reconditioned, rebuilt and used engines for the 4.7-litre and 4.0-litre twin-turbo V8s - supply & fit available nationwide.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
From £4,500 to £9,000
Used from £2,500 · Reconditioned from £4,500 · Common codes: M278.928, M176.980
From £2,500
Tested, bare/short engine
From £4,500
Rod bearings addressed, tested
From quote
Upgraded bearings, full teardown, revised valvetrain
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3 Simple Steps3 Simple Stepsto Finding the Best Mercedes Benz GLE Class 500/580 Replacement Engineto Finding the Best Mercedes Benz GLE Class 500/580 Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryMercedes Benz GLE Class 500/580 - Engine History & Specs at a Glance
The GLE 500 launched with the W166 generation in 2015, powered by the M278 4.7-litre twin-turbo V8 - a 435hp powerhouse derived from the S-Class engine family. In 2019, the all-new W167 GLE 580 replaced it with the M176 4.0-litre twin-turbo V8 featuring 48V EQ Boost mild-hybrid technology - more power, better efficiency, and cylinder deactivation for improved economy, all while retaining the V8 character that defines the GLE flagship.
Variant HistoryMercedes Benz GLE Class 500/580 - Engine History & Specs at a Glance
The GLE 500 launched with the W166 generation in 2015, powered by the M278 4.7-litre twin-turbo V8 - a 435hp powerhouse derived from the S-Class engine family. In 2019, the all-new W167 GLE 580 replaced it with the M176 4.0-litre twin-turbo V8 featuring 48V EQ Boost mild-hybrid technology - more power, better efficiency, and cylinder deactivation for improved economy, all while retaining the V8 character that defines the GLE flagship.
Mercedes Benz GLE Class 500/580
Fuel TypePetrol (M278: twin-turbo V8; M176: twin-turbo V8 with 48V MHEV)
Engine Size Range4.0L-4.7L (M278: 4,663cc; M176: 3,982cc)
Power Output Range435-489hp across the variant's historyEngine History Timeline
M278.928 4.7L twin-turbo V8, 435hp @ 5,250rpm (GLE 500, W166)
M176.980 4.0L twin-turbo V8 with 48V EQ Boost, 489hp (GLE 580, W167)
Facelift W167; M176 continues with refinements to 48V system
Key Specs Snapshot
Fuel TypePetrol (M278: twin-turbo V8; M176: twin-turbo V8 with 48V MHEV)Engine Size Range4.0L-4.7L (M278: 4,663cc; M176: 3,982cc)Power Output Range435-489hp across the variant's historyYears Produced2015-presentEvery engine fitted to the Mercedes Benz GLE Class 500 and 580 is covered below, with UK rebuilt pricing and known failure points - from M278 timing chain and cylinder scoring issues to M176 48V system vulnerabilities.
Mercedes Benz GLE Class 500/580 Engine Codes - Specifications & Replacement CostMercedes Benz GLE Class 500/580 Engine Codes - Specifications & Replacement Cost
4.7L Twin-Turbo V8 (2015-2019)
Power Output435 hp (320 kW) @ 5,250 rpmTorque700 Nm @ 1,800-4,000 rpmYears Fitted2015-2019Displacement4,663ccCylindersV8, 32-valve, DOHC, twin-turbochargedEngine CodeM278.928
Compatible Trim Levels
- GLE 500 4MATIC
- GLE 500 4MATIC AMG Line
- GLE 500 4MATIC Night Edition
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£2,500-£4,000
Reconditioned
Addressed known issues, tested
£4,500-£6,000
Rebuilt
Full teardown, upgraded internals
£5,500-£8,500
Common Failure
Timing chain tensioner failure and cylinder scoring - the M278 has a complex timing chain arrangement with one primary and two secondary chains. Early build M278 V8s had problems with timing chain tensioners causing rattle on start-up. If not addressed, this can lead to replacement of the entire chain drive system. Cylinder wall scoring has also been reported, with deep scores found in several cylinders. Typical failure mileage: 80,000-120,000 miles.
The GLE 500's M278 and the GLE 580's M176 are both hand-built twin-turbo V8s - powerful, refined, and the heart of the GLE flagship experience. However, each has well-documented weaknesses that can lead to significant repair costs. The M278 suffers from timing chain tensioner issues and cylinder scoring. The M176 has 48V system vulnerabilities and cylinder deactivation-related wear. Every rebuilt engine supplied through EnginesMarket includes upgraded components addressing the original failure point, plus a minimum 12-month unlimited-mileage warranty.
The 4.7-litre V8's Critical Weak Point
Affected Vehicles
Mercedes GLE 500 4MATIC (M278.928, 2015-2019)
Typical Failure Mileage
80,000-120,000 miles
Root Cause
Early build M278 V8s had problems with timing chain tensioners causing a rattle on start-up. The engine has a complicated timing chain drive arrangement including one primary chain and two secondary chains, each equipped with a tensioner (three total). If not addressed, this can lead to replacement of the entire chain drive system together with cam adjusters. Oil starvation due to failure of the oil pump drive gear has also been reported.
Why It Happens
Early build M278 V8s had problems with timing chain tensioners causing a rattle on start-up. The engine has a complicated timing chain drive arrangement including one primary chain and two secondary chains, each equipped with a tensioner (three total). If not addressed, this can lead to replacement of the entire chain drive system together with cam adjusters. Oil starvation due to failure of the oil pump drive gear has also been reported.
Dealer (parts + labour)
£800-£1,200
Specialist (parts + labour)
£500-£800
What it involves
Replace timing chain tensioners, check valves
Suitability
Effective if caught early when rattle first appears
1 - 2 daysDealer (parts + labour)
£3,000-£4,500
Specialist (parts + labour)
£2,000-£3,000
What it involves
Replace primary and secondary chains, tensioners, guides, cam adjusters
Suitability
If rattle has persisted and chain stretch is confirmed
1 - 2 daysDealer (parts + labour)
£6,000-£9,000
Specialist (parts + labour)
£4,000-£6,000
What it involves
Full strip-down, replace timing system, inspect cylinder walls
Suitability
If timing failure has caused valve damage
1 - 2 daysDealer (parts + labour)
£10,000-£14,000
Specialist (parts + labour)
£5,500-£8,500
What it involves
Supply & fit rebuilt M278 with upgraded tensioners, 12-month warranty
Suitability
If cylinder scoring or catastrophic timing failure
1 - 2 daysAll prices are indicative UK market ranges based on current UK specialist supplier data.| Repair Tier | Dealer (Parts + Labour) | Specialist (Parts + Labour) | What It Involves | Suitability | Estimated Time |
|---|---|---|---|---|---|
 Preventative - Tensioner replacement Minor | £800-£1,200 | £500-£800 | Replace timing chain tensioners, check valves | Effective if caught early when rattle first appears | 1 - 2 days |
 Intermediate - Full timing chain system Best Value | £3,000-£4,500 | £2,000-£3,000 | Replace primary and secondary chains, tensioners, guides, cam adjusters | If rattle has persisted and chain stretch is confirmed | 1 - 2 days |
Major - Engine-out rebuild Best Value | £6,000-£9,000 | £4,000-£6,000 | Full strip-down, replace timing system, inspect cylinder walls | If timing failure has caused valve damage | 1 - 2 days |
Full Replacement - Rebuilt M278 engine Best Value | £10,000-£14,000 | £5,500-£8,500 | Supply & fit rebuilt M278 with upgraded tensioners, 12-month warranty | If cylinder scoring or catastrophic timing failure | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
A typical 2015-2019 GLE 500 4MATIC is worth approximately £15,000-£28,000 depending on mileage and condition. The GLE 500 sits in the £15,000+ band - replacement cost is typically justified for well-maintained examples.
Our Recommendation
Our Recommendation
If you hear a rattling noise on cold start from your GLE 500, act immediately. Some M278 engines are failing around the 100-120k mark. A £500-£800 specialist tensioner replacement is significantly cheaper than the £5,500+ full engine replacement. On a GLE 500 worth £15,000-£28,000, a £1,000 timing system inspection is excellent preventative maintenance.
Don't Let Timing Chain Failure, Cylinder Scoring, or 48V System Issues Write Off Your Mercedes GLE 500 or 580
Whether you're facing M278 timing chain tensioner wear or cylinder scoring on your GLE 500, or M176 48V system issues on your GLE 580, EnginesMarket makes it simple to compare quotes from trusted UK Mercedes V8 specialists. Every rebuilt engine in our network carries upgraded components addressing the original design weakness - plus a minimum 12-month unlimited mileage warranty with nationwide delivery and supply & fit options. Don't pay main dealer premiums. Compare prices from independent Mercedes V8 specialists who know these twin-turbo engines inside out.
Compare rebuilt M278 Mercedes GLE 500 engine prices
12-Month Minimum
UK Specialists Vetted
Best Price GuidanceImportant Information
Important Information
"All prices are indicative UK market ranges based on historical quote data and repair requests from our network of engine specialists. Dealer pricing is estimated based on published main dealer labour rates and genuine OEM parts pricing. Specialist pricing reflects actual quote data from EnginesMarket's UK network. Actual costs vary depending on damage severity, vehicle condition, variant, and workshop location within the UK. Use our free comparison tool to get tailored quotes for your specific Mercedes GLE Class 500 or 580 V8. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
Mercedes Benz GLE Class 500/580 V8 Engine ReplacementFrequently Asked Questions
Question 1How much does a Mercedes GLE 500 or 580 V8 engine replacement cost in the UK-
Short summary: A rebuilt M278 engine for the GLE 500 costs £5,500-£8,500 supply-only; a rebuilt M176 engine for the GLE 580 costs £6,000-£9,000 supply-only. Fitting adds £1,000-£2,000 depending on complexity - V8 work requires specialist knowledge.
- GLE 500 (M278.928): rebuilt unit £5,500-£8,500; used engine from £2,500
- GLE 580 (M176.980): rebuilt unit £6,000-£9,000; used engine from £3,000
- M278 timing chain system (labour only): £2,000-£3,000 at specialist
- M176 48V battery replacement: £1,800-£2,500 at specialist
Question 2What are the signs of timing chain failure on a Mercedes GLE 500-
Short summary: A rattling noise on cold start lasting several seconds is the classic warning sign on the M278 V8. The engine has a complex timing chain arrangement with three tensioners. If ignored, it can lead to catastrophic engine failure.
- Cold start rattle that lasts several seconds - earliest warning
- Some M278 engines failing around 100-120k miles
- Check engine light with cam/crank correlation codes
- There were reports of engine oil starvation due to failure of the oil pump drive gear
Question 3Is the Mercedes GLE 580 V8 engine (M176) reliable-
Short summary: The M176 is considered a robust and powerful engine, but it has known 48V system issues that can immobilise the vehicle. Cylinder deactivation can also cause vibration and oil consumption issues. The 48-volt ground connection recall affects 2019-2024 models.
- 48V battery and ISG failures can cause no-start - requires specialist replacement
- 48V ground connection recall - check your VIN immediately
- Cylinder deactivation can cause vibration and increased oil consumption
- Well-maintained M176 engines exceed 100,000 miles
Question 4How long do Mercedes GLE 500 and 580 V8 engines last-
Short summary: Properly maintained M278 V8 engines can reach 100,000-150,000 miles before major work, though some fail around the 100-120k mark. The M176 is too new for definitive long-term data, but with regular maintenance, similar longevity is expected.
- M278 (500): 100,000-150,000 miles with regular servicing - some fail earlier
- M176 (580): too early for definitive data - 48V and cylinder deactivation issues from 30k-70k miles
- Service interval is 10,000 miles or 12 months - use Mercedes-spec oil (MB 229.5)
- Late oil changes accelerate timing chain wear on M278 and cylinder deactivation issues on M176
Question 5Is it worth replacing the engine in my Mercedes GLE 500 or 580-
Short summary: Yes, if the GLE is otherwise in good condition with no rust or major electrical faults. A rebuilt M278 costs £5,500-£8,500 - far less than replacing a £15,000-£28,000 vehicle. The GLE 580's higher value (£35,000-£55,000) makes replacement even more financially justifiable.
- GLE 500 values: £15,000-£28,000 depending on year, mileage and condition
- GLE 580 values: £35,000-£55,000 - premium V8 SUV residual values remain strong
- Rebuilt engine with upgraded components fixes original weak points
- Supply & fit typically £6,500-£11,000 depending on engine code
- New engine includes 12-month unlimited mileage warranty
Question 6What oil does my Mercedes GLE 500 or 580 V8 need-
Short summary: Mercedes-Benz specifies MB 229.5 high-performance oil - typically 5W-30 or 5W-40 fully synthetic. The M278 requires approximately 8.5 litres; the M176 requires approximately 9.5 litres.
- M278 (500): MB 229.5 5W-30 or 5W-40 - high-spec synthetic only
- M176 (580): MB 229.51 5W-30 - 9.5L capacity
- Never use non-approved oil - destroys timing chain tensioners and hydraulic lifters
- Change every 10,000 miles or 12 months - stretched intervals cause timing chain wear and cylinder scoring
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supply & fit available for M278 and M176
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