Mercedes GLS580Engine Rebuild— From £6,500
Specialist Mercedes GLS580 engine rebuilds and replacements, with registration-based engine matching, nationwide recovery and a 12-month unlimited-mileage warranty
Rated Mercedes Engine Specialists — 1,800+ Engines Rebuilt
Specialist technicians with 10-15 years of experience
12 Month Unlimited-Mileage Warranty
Nationwide Recovery
Free Engine Matching by Registration
M256 Specialists
Your Mercedes GLS580 Engine
Vehicle
Mercedes GLS580
Model
GLS
Variant
GLS580
Fuel
Petrol Twin-Turbo V8 MHEV
Engine
M176
Capacity
4.0L V8
Generation
X167 (2019–present)
Rebuild From
£6,500
Not sure which engine you have?
The GLS580 uses the M256 3.0-litre inline-six mild-hybrid engine — enter your registration below and we'll confirm your exact spec before you get a quote.
DVLA & VIN verified
100% secure & private
No obligation quote
Mercedes GLS580Engine Rebuild Price
Starting From £6,500
Engine Code
M256Rebuild From
£3,200
Generation
R190 (2023–present)
Exact price depends on condition and parts required — submit your reg for a fixed-price quote.
Mercedes GLS580 Oil Leaks & Coolant System Wear (M256 I6)
The M256 is a sophisticated 3.0-litre inline-six with an integrated starter-generator and electric auxiliary compressor — a more modern and efficient design than the older M276 V6. We replace timing chains, bearings, water pump and gaskets as standard on every M256 rebuild.
Because the GLS580 uses a completely different engine family from the V8 M178 fitted to the GLS 63 and GT 63 S, parts and rebuild specifications don't cross over between them.
Source: Established M256 specialist pattern — timing chain, bearing and gasket wear across integrated-starter-generator inline-six units.
Mercedes GLS580ENGINE OPTIONS
Every GLS580 is different. That's why we offer the right solution for your engine, your car and your budget.
REBUILDING YOUR GLS580 ENGINE
We rebuild the engine your GLS580 already has instead of selling you a used engine of unknown history — strip it down, pressure-test it, and replace every worn or damaged component (timing chains, bearings, water pump, gaskets) with updated OEM parts. Near-new performance with a 12-month unlimited-mileage warranty.
From £3,200RECONDITIONED GLS580 ENGINES
A full strip-down, inspection and replacement of worn parts rather than a straight swap. If that's what you're after, our rebuild service is exactly that.
Learn moreREFURBISHED GLS580 ENGINES
Restoring your existing engine to full working condition rather than replacing it outright. Our rebuild service covers this.
Learn moreREMANUFACTURED GLS580 ENGINES
Built to original specification with updated components. That's consistent with what our rebuild service delivers on the M256.
Learn moreREPLACEMENT GLS580 ENGINES
If your existing engine is beyond economical repair, we offer complete engine replacement and fitting – sourced and fitted by our team, with the same 12-month warranty.
Learn moreUSED GLS580 ENGINES
Matched low-mileage used engines for when time is critical. We source and fit these too, but most owners choose a rebuild once they understand the compatibility risks.
Learn moreNOT SURE WHICH OPTION IS RIGHT FOR YOU?
Enter your registration below and we'll confirm your M256 and talk you through the best solution for your GLS580, honestly.
Ask About Your Options
OUR WORKSHOP
01RECOVERY COLLECTION
02M256 ENGINE STRIPPED FOR REBUILD INSPECTION
03VALVE COVERS & COOLANT COMPONENT WORK
04TECHNICIANS AT WORK
05ENGINE TESTING (RIG)
06COMPLETED & READY FOR REFIT
Real photos from our workshop — not stock imagery. This is what a genuine Mercedes GLS580 rebuild looks like.
Mercedes GLS580 ENGINE REBUILD PROCESS
WHAT MERCEDES GLS580 OWNERS SAY
WE COVER YOUREXACT VEHICLE
Enter your registration below and we'll confirm your GLS580 has the M256, along with an exact rebuild price.
WHY MERCEDES GLS580 OWNERS CHOOSE US
Engine matched using VIN or registration number
Genuine specialist workshop — not a broker
Specialist technicians with 10-15 years of experience
We don't swap your engine for an unknown used unit
Nationwide recovery, workshop rebuild
12 month unlimited-mileage warranty
All engine ancillaries serviced as part of the rebuild
Trade & public enquiries welcome
Dedicated advisor from quote to fit
OUR MOST RECENTMERCEDES RECOVERIES & REBUILDS
Real vehicles brought into our workshop. Open bonnets, stripped blocks, and cars ready for collection — this is what genuine engine work looks like.
Mercedes GLS580
RECOVERY
Mercedes GLS 63
DIAGNOSTICS
Mercedes GLS
STRIPPED ENGINE
Mercedes GLS S
TIMING CHAIN REPLACEMENT
Mercedes GLS580
IN FOR REBUILD
Mercedes GLS C
REBUILD IN PROGRESS
HOW IT WORKS
SEND YOURREGISTRATION
RECEIVE YOURFIXED-PRICE QUOTE
WE RECOVERYOUR CAR
REBUILD &REFIT
Most GLS models are recovered within a few hours of booking. Most rebuilds are completed within 3-5 working days.
Workshop slots fill up fast — book your recovery today.
LOOKING FOR A USED ORREPLACEMENT ENGINEINSTEAD?
We supply low-mileage, VIN-matched used units too, and offer full replacement and fitting. However, most GLS580 owners choose a rebuild once they realise it removes compatibility risk and works out more cost-effective over the life of the car.
Enter your reg below — we'll show you every option, honestly.
ABOUT THE MERCEDES GLS580 ENGINE
The GLS580 is the flagship non-AMG petrol model in the GLS range, introduced with the X167 generation in 2019. It uses the M176 — a 4.0-litre twin-turbo V8 with mild-hybrid assistance, part of Mercedes' second-generation biturbo V8 family. The M176 delivers substantial power and torque while incorporating cylinder deactivation for improved efficiency. The GLS580 remains in production as of 2026.
We continue to rebuild and replace M256 engines for every GLS580 on the road.
MERCEDES GLS580 ENGINE CODES
M256 (R190, 2023–present)
A 3.0-litre inline-six petrol mild-hybrid engine fitted to the GLS580 from 2023 to present. The M256 features an integrated starter-generator (ISG) and electric auxiliary compressor, making it a more modern and efficient design than the older M276 V6. We replace timing chains, bearings, water pump and gaskets as standard on every M256 rebuild.
Check Your M256 GLS580MERCEDES GLS580 ENGINE COMPATIBILITY
Because the GLS580 uses a single engine family across the entire X167 generation, compatibility is relatively straightforward — but accurate matching still matters for ancillaries, ECU calibration, and year-specific revisions. Before we quote or supply anything, we confirm:
Your exact engine code (M256) via registration or VIN
Your generation (R190)
Drivetrain and ancillary specification
Any electronics or ECU considerations specific to your exact build
This is why we always start with your registration rather than a generic GLS quote — it protects you from paying for parts that don't fit your actual car.
MERCEDES GLS580 APPLICATIONS BY GENERATION
Generation
Chassis
Years
Engine Code
Fuel
MERCEDES GLS580 ENGINES BY YEAR
From the R190's launch in 2023, the GLS580 has used the M256 3.0-litre inline-six mild hybrid throughout. If you're unsure of your exact spec, we'll confirm it before you book.
The M256 has been fitted to every GLS580 since launch — if your registration year isn't listed above, get in touch and we'll confirm availability directly against your reg.
WE COVER EVERY MERCEDES GLS580 MODEL YEAR:
Mercedes GLS580
2019 Engine Rebuild
Mercedes GLS580
2020 Engine Rebuild
Mercedes GLS580
2021 Engine Rebuild
Mercedes GLS580
2022 Engine Rebuild
Mercedes GLS580
2023 Engine Rebuild
Mercedes GLS580
2024 Engine Rebuild
Mercedes GLS580
2025 Engine Rebuild
Mercedes GLS580
2026 Engine Rebuild
If your registration year isn't listed above, get in touch — we'll confirm availability directly against your reg.
MERCEDES GLS580 ENGINE COSTS
A Mercedes GLS580 engine rebuild starts from
£6,500
A full replacement engine and fitting service is also available. Exact pricing depends on the condition of your existing engine and the parts required — submit your registration for a fixed-price quote within 30 minutes.
12 MONTH
UNLIMITED-MILEAGE
WARRANTY
MERCEDES GLS580 ENGINE SIZES
• Mercedes GLS580 3.0 Litre Engine (M256, I6)
MERCEDES GLS580 FUEL TYPES
• Mercedes GLS580 Petrol Mild Hybrid Engine Rebuilds
RELATED MERCEDES GLS VARIANTS
Most Mercedes GLS engine rebuilds are completed within 3-5 working days.
Nationwide recovery and collection available for all GLS models.