Mercedes‑BenzGLE1997–present4 Generations • M276 • OM642 • OM654 • OM656 • M177

GLE Engines — The Complete UK Guide

Every GLE engine — from the original M-Class W163 to the latest V167 — across four generations of Mercedes-Benz’s mid-size luxury SUV. Real UK costs, reliability data and ownership verdicts for the W163 (1997–2005), W164 (2005–2011), W166 (2012–2019) and V167 (2020–present). Backed by real UK enquiry data from Mercedes-Benz owners in 2025 [MB-VERIFIED].

Explore GLE Engines

  • Real UK Enquiries (2025) [MB-VERIFIED]

  • 4 Generations Covered

  • 10+ Engine Codes

  • Part of Engine Finders

GLE —
The Ownership Verdict

Verdict MetricOur Call
Overall Ownership Rating

★★★★☆

Replacement Economics

✅ The GLE rule: generation and engine are everything — a V167 host comfortably justifies replacement; a W163 or early W164 often doesn't. The OM642 V6 diesel is the workhorse to buy; the M276 V6 petrol has a timing chain caveat

Reliability

★★★★☆

Most Reliable Engine

OM642 — the 3.0L V6 diesel workhorse; 880 UK enquiries in 2025, well‑understood oil cooler seal weakness but fundamentally robust [MB-VERIFIED]

Highest‑Risk Engine

M276 — 3.0L/3.5L V6 petrol with timing chain stretch on earlier examples; 390 UK enquiries in 2025 [MB-VERIFIED]

Best Used Buy

W166 (2015–2019) GLE 350d with OM642 — the facelifted M‑Class renamed GLE, with the proven V6 diesel and values that have absorbed steep depreciation

Average Engine Replacement

£1,800–£8,000 supply‑only [MB-QUOTE]

Most Common Failure Enquiry

OM642 oil cooler seal leak — 880 UK enquiries in 2025 [MB-VERIFIED]

Mercedes Ranking

🥇 The mid‑size SUV benchmark — the GLE is Mercedes’ best‑selling large SUV, offering the space and capability that made the M‑Class a legend, now with modern refinement

GLE
at a Glance

  • Generations

    4 (W163 1997–2005, W164 2005–2011, W166 2012–2019, V167 2020–present)

  • Years Produced

    1997–present

  • Engine Codes Tracked

    10+

  • Fuel Types

    Petrol, Diesel, Petrol Hybrid, Diesel Hybrid

  • Most Enquired Engine (2025)

    OM642 — 880 enquiries across GLE/C‑Class/E‑Class/GLC/Sprinter [MB-VERIFIED]

  • Most Reliable

    OM642 — 3.0L V6 diesel with proven long‑term durability

  • Highest‑Risk

    M276 — timing chain stretch on earlier examples

  • Typical Replacement Cost

    £1,800–£8,000 supply‑only [MB-QUOTE]

  • Typical Host Value

    W163: £1,500–£5,000 • W164: £3,000–£10,000 • W166: £6,000–£22,000 • V167: £18,000–£80,000+ [THIRD-PARTY]

  • SECTION 4 — GENERATIONS —

    H2: GLE Generations — Find Your Vehicle

  • Sub-headline: Four generations, four very different ownership stories — from the body‑on‑frame original to the latest high‑tech luxury SUV.

    First Generation — W163 M‑Class (1997–2005)

  • [1997–2005] • M112 3.2 V6 petrol • M113 4.3/5.0 V8 petrol • OM612/OM647 2.7/3.2 diesel

    ★★★☆☆

  • Our Verdict: The original M‑Class — body‑on‑frame, genuinely capable off‑road, and built in Alabama. Parts are cheap and widely available, but values are low; a £2,000–£5,000 engine replacement can easily exceed the car's value. Buy only as a keeper or project, not as a daily driver where a major failure would be terminal.

    Explore W163 →

  • Second Generation — W164 M‑Class (2005–2011)

    [2005–2011] • M272 3.5 V6 petrol • M273 5.5 V8 petrol • OM642 3.0 V6 diesel

  • ★★★☆☆

    Our Verdict: The unibody W164 moved the M‑Class firmly into the luxury SUV segment. The OM642 V6 diesel is the engine to seek — robust and well‑understood. The M272/M273 petrol V6/V8 engines have balance‑shaft and timing chain issues that can be costly. Values are low enough that a full recon often fails the 70% threshold.

  • Explore W164 →

    Third Generation — W166 GLE (2012–2019) 🔥 Most Enquired — data aggregated from shared engines [MB-VERIFIED]

  • [2012–2019] • M276 3.0 V6 petrol • OM642 3.0 V6 diesel • OM651 2.1 diesel • M157/M156 AMG V8s

    ★★★★☆

  • Our Verdict: The W166 is the GLE sweet spot — renamed from M‑Class in 2015, it offers the proven OM642 diesel, the refined M276 petrol (post‑2016 facelift is safer), and values that have absorbed the steepest depreciation. The OM651 diesel is cheaper but carries the “Black Death” injector‑seal caveat. This is the best used GLE you can buy.

    Explore W166 →

  • Fourth Generation — V167 GLE (2020–present)

    [2020–present] • OM654 2.0 diesel • OM656 3.0 diesel • M256 3.0 petrol • M177 AMG V8 • EQ hybrids

  • ★★★★☆

    Our Verdict: The modern V167 is larger, more luxurious, and packed with technology — but the complexity is real. The OM654 diesel is reliable; the OM656 six‑cylinder diesel and M256 petrol are impressive but untested long‑term. The 48‑volt mild‑hybrid systems add a layer of potential expense. Buy new or nearly‑new with warranty; used examples need a thorough specialist inspection.

  • Explore V167 →

    Comparison: W166 vs V167 — which generation should you buy?

  • W166 (2012–2019)

    V167 (2020–present)

  • Best diesel

    OM642 3.0 V6 — proven, robust, 880 enquiries

  • OM654 2.0 — clean, modern, lower maintenance

    Best petrol

  • M276 (post‑2016) — refined, known issues

    M256 3.0 — advanced, complex

  • Avoid

    Pre‑2016 M276 without chain history

  • Early OM656 without full service history

    Verdict

  • ✅ Best value — the smart used buy

    ⚠️ Modern choice — budget for warranty

Overall Rating

★★★★☆

3.9/5

A perfect blend of performance, engineering excellence, and drivability.

GLE Generations —
Find Your Vehicle

Four generations, four very different ownership stories — from the body‑on‑frame original to the latest high‑tech luxury SUV.

Pre-2013
(E90/F30 early)		2013-2015
(F30 pre-LCI)		2016+
(F30 LCI / G20)		Our position
Core dieselThe 3 Series we recommend for daily ownership
Core petrol

Read the full comparison:

GLE Engine Codes — The Database
The Database

The complete database of BMW 3 Series engine codes with real UK enquiry data, fitted models, and replacement cost insights.

Proprietary UK Data

Every figure below is powered by 24,650+ real UK owner enquiries in 2025. This is data you won't find anywhere else.

Engine CodeFuel2025 EnquiriesView
OM651Diesel1,250
OM642Diesel880
OM654Diesel520
M276Petrol390
M177Petrol370
M112Petrol-
M113Petrol-
M156Petrol-
M157Petrol-

Data sources:

Enquiry volumes:
EM_Proprietary_Data_2025.txt [EM-VERIFIED]

Costs:
Table A - Engine Replacement Economics [EM-QUOTE]

Engine codes:
Cross-referenced from your existing data

Common GLEEngine Problems

The six most common GLE failure patterns — from OM642 oil cooler seals to M276 timing chain stretch — ranked by severity.

01

OM642 oil cooler seal leak

Monitor

The V6 diesel's primary weak point — an O‑ring fails in the “V” of the engine, requiring significant disassembly to access. W164 and W166 GLE 350d/250d affected. £800–£1,500 repair [MB-QUOTE].

Read more
02

M276 timing chain stretch

Monitor

Chain stretch on earlier W166 examples (pre‑2016) — well‑understood and rarely catastrophic if caught early. GLE 400/450 affected. £1,500–£2,500 repair [MB-QUOTE].

Read more
03

OM651 “Black Death” injector seal failure

Catastrophic if Ignored

Copper injector seals degrade, leaking combustion gases into a carbon “tar” that can weld the injector into the head. W166 GLE 250d affected. £400–£1,200 seal repair; up to full engine replacement if neglected [MB-QUOTE].

Read more
04

M272/M273 balance shaft failure

Immediate

The balance shaft sprocket wears prematurely, causing timing issues and potential catastrophic failure. W164 petrol M‑Class affected (pre‑2008). £2,000–£4,000 repair [MB-QUOTE].

Read more
05

OM654 rocker arm wear (V167)

Monitor

The 2.0‑litre diesel can suffer from rocker arm and camshaft wear, causing irregular idle and a “plop” noise from the air intake system. V167 GLE 300d affected. £800–£1,500 repair [MB-QUOTE].

Read more
06

48V mild‑hybrid system failures (V167)

Monitor

The EQ Boost 48V system can experience battery, starter‑generator or cooling pump issues — expensive and specialist‑only. V167 GLE 450/53 affected. £1,000–£3,000+ repair [MB-QUOTE].

Read more

Urgency Key

Catastrophicstop driving, specialist inspection immediately

Immediatebook inspection now

Monitorbook inspection soon

Lowplan at next service

GLE Market Intelligence — What UK Owners Told Us in 2025

826+

Total Enquiries in 2025

[BMW-VERIFIED]

Signal
2025 Data
Demand Trend

OM642 diesel enquiries (GLE + C‑Class/E‑Class/GLC/Sprinter)

880 [MB-VERIFIED]

️ Stable

OM651 diesel enquiries

1,250 [MB-VERIFIED]

⬇️ Falling

OM654 diesel enquiries (V167 GLE 300d)

520 [MB-VERIFIED]

️ Rising

M276 petrol enquiries

390 [MB-VERIFIED]

️ Stable

Insights from the data:

“Interesting insight:” The OM642 V6 diesel — fitted to the W164 and W166 GLE 350d/250d — generated 880 UK enquiries in 2025, making it the second most‑enquired Mercedes diesel after the OM651 [MB-VERIFIED]. The vast majority relate to the oil cooler seal leak — a labour‑intensive but well‑understood repair. Unlike the OM651’s “Black Death” injector seal failure, the OM642’s weakness is rarely catastrophic if caught early. This makes the W166 GLE 350d the smartest used buy in the range.

The W166 generation (2012–2019) accounts for the majority of GLE‑specific buyer interest, driven by values that have absorbed steep depreciation while still offering modern luxury and the proven OM642 diesel. The post‑2015 facelift (which renamed M‑Class to GLE) is the sweet spot — updated electronics, improved interior, and the M276 petrol’s timing chain issues largely resolved.

The V167 generation (2020–present) is increasingly popular but carries more complex and expensive powertrains — the OM656 six‑cylinder diesel, the M256 petrol with 48V hybrid, and the M177 AMG V8. Early examples are beginning to appear on the used market, but buyers should budget for a thorough specialist inspection and consider extended warranty. The OM654 four‑cylinder diesel is the safest V167 engine choice for reliability and running costs.

Editorial Pull-Quote

The One Thing We’d Tell Every GLE Buyer

“Buy a 2015–2019 W166 GLE 350d with the OM642 V6 diesel — it’s the most reliable, best‑value GLE you can own. The oil cooler seal is a known, manageable £800–£1,500 repair, not a reason to avoid the car. If your budget stretches to a V167, choose the OM654 diesel and insist on full service history — the more complex OM656 and M256 engines are impressive but untested long‑term.”

GLE Engine Replacement Costs
By Generation

Real UK pricing for every GLE engine — used, reconditioned and rebuilt supply-only costs, with independent labour guidance.

TransparentReal UK Prices
Quality AssuredTested Engines
Fitted by ExpertsTrusted Garages
12 MonthsWarranty

Important Notes

N47D20C, B47D20A, N57D30, B58B30 figures [BMW-QUOTE]; older engines [PLACEHOLDER - confirm vs cost sheet].

Labour Estimate

Fitting a GLE engine typically takes 10–16 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer) [MB-QUOTE]. The GLE rule — generation and engine are everything: A £3,200–£5,500 OM642 recon against a £6,000–£22,000 W166 GLE sits at 25–50% of the car's value — well below our 70% threshold for Mercedes-Benz. That's why the W166 350d is our top used recommendation. By contrast, a £3,200–£5,500 OM642 recon against a £3,000–£6,000 W164 M‑Class sits at 50–90% of the car's value — borderline to terminal on lower-value examples. An OM651 recon against a £4,000–£8,000 W166 GLE 250d sits at 60–80% — watch the numbers. The V167's £8,000–£14,000 M177 AMG recon against a £30,000–£80,000+ car is comfortably safe. In short: fix a W166 350d, evaluate a W164 diesel carefully, and walk away from a W163 with a major failure unless it's a keeper or project.

The 3 Series rule - generation is everything:

Value the car first; the engine decision follows.

All prices in GBP (£)   •   Supply only   •   Subject to availability and condition

How the GLE Engine Range Evolved —1997 to Today

From the original M10 to today's advanced B-series, explore how engineering, emissions and performance shaped every generation of 3 Series engines.

7 Generations1975 to Present
25+ Engine FamiliesFrom M10 to B58
50 Years of EngineeringPerformance & Innovation
Built for DriversReliability + Dynamics
Key Engines
M112 3.2 V6, M113 4.3/5.0 V8, OM612/OM647 2.7/3.2 diesel
Why BMW Changed
Mercedes launched the M‑Class as its first SUV, built in Alabama with body‑on‑frame construction — engines were carried over from the E‑Class and S‑Class of the era, tuned for off‑road torque rather than on‑road performance
Worth Knowing
The OM612 2.7 CDI is the engine to seek in a W163 — it's the most fuel‑efficient and has the fewest major failure reports. The V8s are thirsty and expensive to fix if they go wrong

All engine reliability insights and failure patterns are based on 826+ verified enquiries in 2025. Data covers the UK market. [BMW-VERIFIED]

Who Should Buy a GLE?

Different buyers, different priorities. Here is our verdict on who the GLE is perfect for - and who should think twice.

Family Buyer

★★★★★

The GLE is one of the best family SUVs Mercedes makes — 5‑seat standard, optional 7‑seat on the W166 and V167, massive boot, and excellent towing capability. Buy a W166 350d (OM642) for the sweet spot of space, safety and value. The V167 is more luxurious but more expensive to maintain.

Daily Commuter

★★★★★

The GLE is a large, comfortable cruiser — not a city car. If your commute is motorway miles, the OM642 diesel (W166) or OM654 diesel (V167) will return 35–45 mpg and eat the miles in silence. For urban commutes, consider a GLC instead — the GLE is too big for tight city streets.

Budget Owner

★★★★★

A W163 or W164 M‑Class is the most affordable way into a luxury SUV — but a £2,000–£4,000 W164 with an OM642 can be a genuine bargain if it's been well‑maintained. Buy on condition and service history, not mileage. Avoid W163 V8s unless you can afford the fuel and repair bills.

Towing & Working Use

★★★★★

The GLE is a towing champion — the OM642 diesel and OM656 diesel produce 500–700Nm of torque, and the W166/V167 have 3,500kg towing capacity. If you're towing a caravan, horsebox or trailer, the GLE 350d is one of the best SUVs on the market. Keep the servicing strict and it will tow for decades.

Collector / Keeper

★★★★★

If you're keeping a GLE long‑term, buy a 2015–2019 W166 350d with the OM642 V6 diesel — it's the last of the simple, proven, non‑hybrid V6 diesels. The electronic complexity of the V167 is a long‑term risk; the W164 is too old for daily use. The W166 350d is the Goldilocks GLE.

i

Real talk. The right GLE for you depends on your budget, your mileage, and your patience for maintenance. Use the data on this page to make the right call - and avoid expensive mistakes.

Explore GLE Engines

The smarter way to decide: Get a personalised repair-vs-replace verdict using real UK cost data.

Stop guessing. Get the right answer.

Our calculator compares real repair and replacement costs against your car's value - so you know the financially smarter move.

Start Your Verdict Now

Why GLE Owners Trust mercedesengine.uk

Built on Real Data - Every reliability rating and cost range on this page comes from genuine UK quote and enquiry data — not manufacturer marketing, not forum guesswork. The OM642, OM651, M276 and OM654 figures are [MB-VERIFIED] from real 2025 UK enquiries.

We Tell You When Not to Repair - If replacement cost exceeds 70% of what your GLE is worth, we say so. That's why the W164 M‑Class with OM642 carries a warning — not every site tells you when repair doesn't make financial sense.

Vetted Mercedes - Benz Specialists — Our network includes 25+ vetted Mercedes-Benz specialists who work on GLE engines daily — from OM642 oil cooler seal repairs to OM656 six‑cylinder diagnostics. Every specialist is vetted specifically for Mercedes-Benz work, not generalists who happen to take on Mercedes jobs.

Part of Engine Finders - mercedesengine.uk is part of the Engine Finders family, the UK's leading engine replacement marketplace — giving you the research depth of an independent authority with a vetted route to action when you need one.

GLE Frequently Asked Questions

1

How much does a GLE engine replacement cost in the UK?

A GLE engine replacement costs £1,500–£14,000 supply‑only depending on the generation and engine — an OM642 V6 diesel for the W164/W166 is £3,200–£5,500 [MB-QUOTE], an OM651 four‑cylinder diesel is £2,800–£4,800 [MB-QUOTE], an M276 V6 petrol is £3,800–£6,500 [MB-QUOTE], and an M177 AMG V8 is £8,000–£14,000 [MB-QUOTE]. Labour adds 10–16 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer). Use our diagnostic calculator for a personalised estimate.
2

Which GLE engine is the most reliable?

The OM642 3.0‑litre V6 diesel — fitted to the W164 M‑Class (2005–2011) and W166 GLE (2012–2019) — is the most reliable GLE engine. It generated 880 UK enquiries in 2025, most of which relate to the well‑understood oil cooler seal leak [MB-VERIFIED]. It's a labour‑intensive but rarely catastrophic repair — unlike the OM651's “Black Death” injector failure. Read more about the OM642 →
3

Which GLE engine should I avoid?

Three caveats: * Pre‑2008 M272/M273 V6/V8 petrols in the W164 — the balance‑shaft sprocket wears prematurely, causing timing issues and potential catastrophic failure. Avoid without documented replacement. * Early M276 V6 petrols in the W166 (2012–2015) — timing chain stretch is a known issue. Post‑2016 facelift examples are safer. * OM651 diesel in the W166 — it's not a bad engine, but it carries the “Black Death” injector‑seal caveat. Buy only with documented injector‑seal history.
4

How do I know if my GLE engine needs replacing?

Concrete symptoms by engine: * OM642 diesel (W164/W166) — oil leak from the “V” of the engine (oil cooler seals), coolant loss with no visible leak, or oil in the coolant. The oil cooler seal is the primary risk — catch it early and it's a £800–£1,500 repair, not a full engine. * M276 petrol (W166) — cold‑start rattle, timing chain noise, loss of power, check engine light. Timing chain stretch is the primary risk — book a specialist inspection immediately. * OM651 diesel (W166) — chemical smell around the injectors, black carbon “tar” visible on the engine cover, cold‑start rattle. “Black Death” injector seal failure — stop driving if you see tar. * OM654 diesel (V167) — rough idle, a “plop” noise from the intake, loss of power. Rocker arm wear is emerging as a known issue.
5

Is it worth replacing a GLE engine?

Apply the 70% rule: if a reconditioned engine costs 70% or more of your car's current market value, get a scrap valuation before committing. * W163 M‑Class — £1,500–£4,000 recon against a £1,500–£5,000 car = 40–80% — borderline to non‑viable. * W164 M‑Class (OM642) — £3,200–£5,500 recon against a £3,000–£10,000 car = 50–90% — borderline on lower‑value examples, safe on better cars. * W166 GLE (OM642) — £3,200–£5,500 recon against a £6,000–£22,000 car = 25–50% — worth replacing. * W166 GLE (OM651) — £2,800–£4,800 recon against a £4,000–£12,000 car = 40–80% — borderline. * V167 GLE — £3,000–£14,000 recon against an £18,000–£80,000+ car = 10–40% — worth replacing (<a href='https://mercedesengines.uk/engine/amg-m176-m177'>AMG M177</a> is specialist territory but within the car's value). Use our Ownership Decision Tool for a personalised assessment.
6

Which GLE generation should I buy?

Buy a 2015–2019 W166 GLE 350d with the OM642 V6 diesel — it's the most reliable, best‑value GLE you can own. The W166 facelift (2015) updated the electronics, improved the interior, and resolved the early M276 timing chain issues. The OM642 diesel is proven, robust, and cheaply parted. If your budget stretches to a V167, choose the OM654 four‑cylinder diesel — it's the simplest and most reliable V167 powertrain.
7

How do I find my GLE engine code?

Check the following locations: * VIN plate (visible through the windscreen or on the driver's door pillar) — the engine code is encoded in positions 4–8 of the VIN. * Vehicle registration document (V5C) — the engine number is listed in Section 4. * Under‑bonnet sticker — on the slam panel or timing cover, the engine code is often printed on a factory sticker. * Mercedes‑Benz parts catalogue — enter your VIN at a dealer or online parts site to look up the exact engine code. If you're unsure, use our diagnostic calculator — we'll help you identify it as step one.
8

GLE vs GLC — which is more reliable?

They share some engines — the OM651, OM654 and M276 are used across both models. Reliability is therefore comparable for the same engine and generation. The key difference is size and value — the GLC (X253) is smaller, cheaper to run, and typically carries a higher‑value‑to‑replacement‑cost ratio; the GLE (W166/V167) is larger, more expensive to maintain, and offers more towing and passenger capacity. The OM642 V6 diesel is exclusive to the GLE (and larger Mercedes models) — it's the defining GLE engine. Read the full comparison: GLE vs GLC →

Need a head-to-head comparison?

Read our in-depth BMW 3 Series vs 5 Series reliability guide.

Read the Full Head-to-Head

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