Oil cooler seals (engine valley)
usually 120,000–220,000 km · High risk
Signs: Oil leak at the back of the engine / bellhousing
Fix: Reseal the oil cooler (intake off)
€1,000–2,000
Common faults, service intervals and costs
Mercedes-Benz G-Class (W463)
1990–now
3
engines covered
8
known faults
3,110
roadworthiness tests in the statistics
Enter your VIN and mileage and get a plan built for your exact engine and gearbox.
The Mercedes-Benz G-Class (W463) has been built since 1990.
For this generation we cover 3 engines and 8 known faults, each with the mileage range where it usually appears.
The most expensive known risk is Timing chain guides (early engines): it usually appears at 150,000–250,000 km and costs €1,500–3,000 to fix.
In UK roadworthiness tests in 2024, at 50–100 thousand km this model most often failed on: tyres and wheels (4.4 %), lights, wipers and visibility (4.2 %), brakes (3.5 %). It fails more often than an average car of the same age and mileage on: steering. It fails less often than average on: suspension, tyres and wheels, lights, wipers and visibility, body and corrosion.
Engines
| Engine | Fuel | Timing drive | Oil |
|---|---|---|---|
| 3.0 CDI V6 (Mercedes OM642) | Diesel | Chain | 5W-30 · MB 229.51 · ~8.0 L · every 15,000 km |
| 2.9 d inline-six (Mercedes OM656) | Diesel | Chain | 0W-30 / 5W-30 · MB 229.52 / 229.71 · ~7.5–8.5 L · every 15,000 km |
| V6 / V8 petrol (Mercedes M112 / M113) | Petrol | Chain | 5W-40 / 0W-40 · MB 229.3 / 229.5 · every 15,000 km |
Faults by engine
3.0 CDI V6 (Mercedes OM642)
Intake swirl flaps / actuator
usually 120,000–220,000 km · Medium risk
Signs: Engine light, limp mode
Fix: Replace manifold or actuator
€600–1,500
EGR / DPF
usually 150,000–250,000 km · Medium risk
Signs: Limp mode
Fix: Clean or replace
€400–1,800
Timing chain guides (early engines)
usually 150,000–250,000 km · Medium risk
model years 2005–2010 only
Signs: Rattle
Fix: Replace guides and chain
€1,500–3,000
2.9 d inline-six (Mercedes OM656)
No typical faults on record.
V6 / V8 petrol (Mercedes M112 / M113)
Camshaft adjuster magnet oil leak
usually 80,000–160,000 km · Medium risk
Signs: Oil in the wiring plug — can reach the ECU
Fix: Replace magnet, check the harness
€150–600
Crankcase breather hoses
usually 100,000–200,000 km · Wear part
Signs: Oil leaks, whistle
Fix: Replace hoses
€100–300
Crankshaft pulley (harmonic balancer) separating
usually 150,000–300,000 km · Medium risk
Signs: Vibration, drive belt squeals or comes off
Fix: Replace the crankshaft pulley
€200–500
Gearboxes
5G / 7G / 9G-Tronic
Conductor plate / speed sensor (5G / 7G-Tronic)
usually 100,000–220,000 km · Medium risk
Signs: Stuck in gear, limp mode, harsh shifts
Fix: Replace the conductor plate; fluid every 60–100,000 km
€500–1,500
Scheduled service
Intervals and typical prices for the 3.0 CDI V6 (Mercedes OM642) engine. Other engines differ in oil, timing drive and some filters; the app gives the exact plan.
| Item | Interval | Typical price |
|---|---|---|
| Transfer case / rear differential oilTransmission | every 80,000 km | €60–160 |
| Engine oil + oil filterEngine | every 15,000 km or every 12 months | €70–150 |
| Cabin (pollen) filterClimate | every 15,000 km or every 12 months | €15–40 |
| Brake fluidBrakes | every 24 months | €50–95 |
| A/C service (regas + desiccant)Climate | every 24 months | €70–150 |
| Air filterEngine | every 30,000 km or every 24 months | €15–45 |
| Fuel filterFuel | every 30,000 km or every 24 months | €40–110 |
| Automatic transmission fluidTransmission | every 90,000 km | €200–450 |
| Glow plugsEngine | every 100,000 km | €120–300 |
| Auxiliary (serpentine) beltEngine | every 120,000 km | €70–180 |
| Coolant replacementCooling | every 150,000 km or every 96 months | €70–150 |
| Timing chain inspection (listen on cold start)Engine | every 150,000 km | €0–120 |
| Front brake padsBrakes | usually at 30,000–60,000 km | €60–150 |
| Front brake discs + padsBrakes | usually at 60,000–120,000 km | €150–320 |
| Rear brake padsBrakes | usually at 50,000–90,000 km | €50–130 |
| Tyres (set of 4)Wheels | usually at 40,000–60,000 km | €320–700 |
| Wiper bladesBody | checked at service | €20–50 |
| 12V batteryElectrical | checked at service | €100–220 |
Roadworthiness tests by mileage
Share of tests in the United Kingdom (DVSA MOT, 2024) that this model failed because of each system. Bold red means more often and green less often than an average car of the same age and mileage. Sample: 3,110 tests.
| thousand km | 0–50 | 50–100 | 100–150 |
|---|---|---|---|
| Brakes | 0.7 % | 3.5 % | 2.4 % |
| Suspension | 0.6 % | 1.8 % | 2.9 % |
| Steering | 0.8 % | 1.1 % | 0.5 % |
| Tyres and wheels | 3.7 % | 4.4 % | 2.4 % |
| Lights, wipers and visibility | 2.9 % | 4.2 % | 7.4 % |
| Body and corrosion | 0.2 % | 0.5 % | 0.7 % |
| Exhaust, emissions and leaks | 0.7 % | 1.2 % | 2.6 % |
Most common engine versions in the EU
New cars of this generation registered in the EU, Iceland and Norway 2010–2025: 47,153, of which 68 in Croatia. The share shows how common each version is.
| Version | Share | Years | CO₂ | Fuel use |
|---|---|---|---|---|
| 4.0 Petrol4.0 (3,982 cm³) · 310 kW (421 hp) · Petrol | 26.0 % | 2015–2025 | 333 g/km | 14.9 L |
| 2.9 d inline-six (Mercedes OM656)2.9 (2,925 cm³) · 243 kW (330 hp) · Diesel | 15.2 % | 2019–2025 | 289 g/km | 11.0 L |
| 3.0 CDI V6 (Mercedes OM642)3.0 (2,987 cm³) · 180 kW (245 hp) · Diesel | 12.9 % | 2015–2019 | 261 g/km | — |
| 3.0 Hybrid3.0 (2,989 cm³) · 270 kW (367 hp) · Hybrid | 10.7 % | 2024–2025 | 236 g/km | 9.0 L |
| 3.0 CDI V6 (Mercedes OM642)3.0 (2,987 cm³) · 155 kW (211 hp) · Diesel | 7.1 % | 2011–2016 | — | — |
| 2.9 d inline-six (Mercedes OM656)2.9 (2,925 cm³) · 210 kW (286 hp) · Diesel | 6.8 % | 2019–2024 | 288 g/km | 10.9 L |
| Electric432 kW (587 hp) · Electric | 4.4 % | 2024–2025 | — | — |
| 3.0 CDI V6 (Mercedes OM642)3.0 (2,987 cm³) · Diesel | 3.9 % | 2010–2018 | 261 g/km | — |
| 5.5 Petrol5.5 (5,461 cm³) · 400 kW (544 hp) · Petrol | 3.7 % | 2012–2019 | 322 g/km | — |
| V6 / V8 petrol (Mercedes M112 / M113)5.5 (5,461 cm³) · 285 kW (387 hp) · Petrol | 3.2 % | 2011–2024 | 348 g/km | — |
Source: European Environment Agency (EEA), monitoring of CO₂ emissions from new passenger cars, CC BY 4.0. CO₂ and fuel use are official type-approval values (WLTP from 2021), not real-world consumption.
Common questions
Does the Mercedes-Benz G-Class (W463) have a timing chain or a timing belt?
3.0 CDI V6 (Mercedes OM642): chain; 2.9 d inline-six (Mercedes OM656): chain; V6 / V8 petrol (Mercedes M112 / M113): chain.
What are the known problems with the Mercedes-Benz G-Class (W463)?
The faults with the highest risk: oil cooler seals (engine valley) (120,000–220,000 km, €1,000–2,000); timing chain guides (early engines) (150,000–250,000 km, €1,500–3,000); EGR / DPF (150,000–250,000 km, €400–1,800); intake swirl flaps / actuator (120,000–220,000 km, €600–1,500). The full list by engine is on this page.
What does the Mercedes-Benz G-Class (W463) most often fail its roadworthiness test on?
In UK roadworthiness tests in 2024, at 50–100 thousand km this model most often failed on: tyres and wheels (4.4 %), lights, wipers and visibility (4.2 %), brakes (3.5 %). It fails more often than an average car of the same age and mileage on: steering. It fails less often than average on: suspension, tyres and wheels, lights, wipers and visibility, body and corrosion.
What should you check when buying a used Mercedes-Benz G-Class (W463)?
Before you buy, ask an authorised dealer to check by VIN whether the car has any open recalls. On the test drive, watch for these signs: oil leak at the back of the engine / bellhousing; rattle. The full checklist is in the guide to buying a used car.
Models with the same engines
These models share engines with this car, so they share some of its faults too.
Mercedes-Benz E-Class (W213) 2016–2023Mercedes-Benz C-Class (W203) 2000–2007Mercedes-Benz E-Class (W211) 2002–2009Mercedes-Benz GLE (V167) 2019–Mercedes-Benz ML (W164) 2005–2011Mercedes-Benz CLK (C209) 2002–2010Mercedes-Benz SLK (R170) 1996–2004Mercedes-Benz S-Class (W222) 2013–2020
Other Mercedes-Benz models
Mercedes-Benz C-Class (W202) 1993–2000Mercedes-Benz E-Class (W210) 1995–2003Mercedes-Benz E-Class (W124) 1984–1997Mercedes-Benz Vito (W638) 1996–2003Mercedes-Benz A-Class (W168) 1997–2004Mercedes-Benz CLK (C208) 1997–2003Mercedes-Benz ML (W163) 1997–2005Mercedes-Benz 190 (W201) 1982–1993Mercedes-Benz S-Class (W220) 1998–2005Mercedes-Benz SL (R230) 2001–2011
Sources and notes
Faults, intervals and prices are indicative and collected from public sources and owner experience; always rely on the service book and a qualified workshop. Test statistics: DVSA – Anonymised MOT tests and results, Open Government Licence v3.0. Dutch tests: RDW Open Data (CC0). Engine versions: EEA, monitoring of CO₂ emissions from new passenger cars (CC BY 4.0, DG CLIMA). Owner complaints: NHTSA ODI (public domain). Recalls: DVSA Vehicle Safety Branch Recalls Database, OGL v3.0. Brand and model names are trademarks of their owners and are used only to describe the vehicles.
Updated 08/10/2026