Specs, fluids & service · 2013–2015
Mercedes-Benz G 63 AMG 6×6 specs, fluids and service intervals
The numbers you need in the garage, on one page: spec sheet, capacities and service intervals, wheels and tires, and the parts to order. Sourced from owners, specialists and the factory; tags marked confirm in manual haven't been checked against a factory source yet.
Spec sheet
| CHASSIS | W463, three axles |
|---|---|
| YEARS | 2013–2015 |
| BUILT | About 100, Magna Steyr, Graz |
| ENGINE | M157 5.5 L biturbo V8 |
| OUTPUT | 400 kW (544 PS) · 760 Nm |
| GEARBOX | 7G-TRONIC 7-speed automatic |
| DRIVE | 6×6, 30:40:30, low range |
| LOCKERS | Five, in three stages |
| AXLES | Portal, rigid ×3 |
| CLEARANCE | 460 mm (18.1 in) |
| WADING | 1,000 mm (39.4 in) |
| WEIGHT | ≈3,850 kg (8,488 lb) |
By year
| YEARS | PLATFORM | ENGINE | OUTPUT | NOTES |
|---|---|---|---|---|
| 2011– | Australian Army G-Wagen 6×6 | 3.0 L V6 diesel | up to 220 bhp | Land 121 Overlander truck the civilian 6×6 was derived from |
| 2013 | G 63 AMG 6×6 show car | M157 5.5 L biturbo V8 | 400 kW · 760 Nm | Prototypes shown to customers in Dubai |
| 2013–2015 | G 63 AMG 6×6 | M157 5.5 L biturbo V8 | 544 PS · 760 Nm | Built by Magna Steyr in Graz; slightly more than 100 sold |
| 2014–2015 | Brabus B63S-700 6×6 | Brabus-tuned 5.5 L biturbo V8 | — | Tuner version of the factory truck |
| 2015–2018 | G 500 4×4² | M176 4.0 L twin-turbo V8 | 310 kW (422 PS) | Long-wheelbase G body on a shortened 6×6 chassis |
| 2017 | Mercedes-Maybach G 650 Landaulet | V12 | — | Used the 4×4²'s portal axles and raised suspension |
Fluids, capacities & service intervals
Treat a 6×6 as a G 63 engine and gearbox on top of a fleet of differentials: three axles, six portal hubs, a transfer case with a through-drive, plus a compressor and air system. Mercedes and specialist service records matter more here than on any other G. Where a capacity isn't published, have a G specialist confirm it rather than guessing.
| ITEM | SPEC / CAPACITY | INTERVAL | NOTES & PARTS |
|---|---|---|---|
| Engine oil & filter | 0W-40 or 5W-40 full synthetic to MB 229.5 · ≈9 qt with filter on the G 63's M157 (AMSOIL; confirm for 6×6) | Then every 10,000 mi or yearly | Same M157 as the G 63, so short intervals protect the turbos and cam adjusters.Liqui Moly 0W-40 oil change kit, 9 L + Hengst filter (listed 2013–18 G63) · FCP Euro ↗ |
| Air filters | M157 elements (as G 63) | Now, then sooner than usual after desert use | Sand is the 6×6's natural habitat. Check the airbox for dust trails.Mann air filter 278 094 00 04 (listed 2013–18 G63) · FCP Euro ↗ |
| Spark plugs & coils | 8 plugs (Mercedes 004 159 81 03) | Now if no record | Genuine Mercedes spark plug kit 004 159 81 03 (×8, listed 2013–18 G63) · FCP Euro ↗Bosch ignition coil kit 276 906 05 01 (×8, listed 2013–18 G63) · FCP Euro ↗ |
| Engine & charge-air coolant | MB 325.6-approved coolant · two circuits | Now if history is unknown | Pressure-test and inspect the turbo coolant lines.Genuine Mercedes coolant, MB 325.6, 1 gal · FCP Euro ↗Rein M278/M157 turbocharger coolant line repair kit · FCP Euro ↗ |
| Automatic transmission (722.9) | MB 236.15 ATF | Now if no record | Set the level at temperature with a scan tool.FUCHS 722.9 transmission service kit (filter, pan gasket, 2×5 L ATF) · FCP Euro ↗FUCHS ATF 7134 FE (MB 236.15), 1 L · FCP Euro ↗ |
| Transfer case & through-drive | confirm in manual | Now | 6×6-specific. Ask a G specialist for the fluid and capacity.GwagenParts.com search: transfer case · GwagenParts.com ↗ |
| Three axle differentials | Hypoid gear oil · capacities confirm in manual | Now | Clean every magnetic plug and check all three breathers.Red Line 75W-90 GL-5 gear oil (1 qt) · FCP Euro ↗Genuine Mercedes differential drain plug 901 997 05 35 · FCP Euro ↗ |
| Six portal hubs | Hub reduction gear oil confirm in manual | Now, then with the differentials | Check each hub for weeping and metal on the plug.GwagenParts.com search: portal · GwagenParts.com ↗ |
| Tyre-inflation system | Compressor, 4 × 20 L tanks, rotary seals and lines | Leak-test now, then before every trip | Drain water from the tanks if they have drains, and check the gauges against a handheld one.GwagenParts.com search: 6x6 · GwagenParts.com ↗ |
| Diff-lock actuation | Five locks in three stages | Test now | Engage each stage on loose ground; scan for codes.GwagenParts.com search: differential lock · GwagenParts.com ↗ |
| Brake fluid | DOT 4 Plus (MB sheet 331.0) | Now, then every 2 years | Six calipers make for a long bleed.Genuine Mercedes DOT 4 Plus brake fluid, 1 L · FCP Euro ↗ |
| Beadlocks & tyres | 37 in on 18 in two-piece beadlocks | Check tyre date codes and ring-bolt torque now | Old tyres on a low-mileage truck are the norm, not the exception.18-inch 6×6-style two-piece forged beadlock wheel · GwagenParts.com ↗ |
Capability
| Ground clearance | 460 mm (18.1 in) Mercedes |
|---|---|
| Wading depth | 1,000 mm (39.4 in) Mercedes |
| Approach / departure | 50° / 45° Mercedes display board and MotorTrend; Autocar quoted 52° / 54° |
| Breakover | 22° Autocar |
| Fuel tank | 96 L + 63 L auxiliary (159 L / 42 US gal) New Atlas; MotorTrend says 38.6 gal total |
| Curb weight | ≈3,850 kg (8,488 lb) Mercedes; other sources quote 3,775–4,083 kg |
| Fuel economy | 15.6 L/100 km (≈15 mpg US) European cycle, per Wikipedia |
| Top speed | 160 km/h (100 mph), limited |
| Length / width / height | 5,875 / 2,110 / 2,210 mm Autocar |
Wheels & tires
| Factory tire | 37-inch tyres on 18-inch two-piece beadlock wheels (37×12.50R18 seen on Bring a Trailer trucks) |
|---|---|
| Biggest tire · Stock | 37×12.50R18 |
| Biggest tire · KW coilovers (aftermarket) | 38×13.50R18 |
Common G 63 AMG 6×6 repairs
- Tyre-inflation (CTIS) leaksDIFFICULTY 3 / 5
- Portal hub & differential oil serviceDIFFICULTY 2 / 5
- Differential locks slow or not engagingDIFFICULTY 3 / 5
- Turbo coolant lines (M157)DIFFICULTY 4 / 5
- Plugs, coils & cam magnets (M157)DIFFICULTY 2 / 5
- 7G-TRONIC fluid & filterDIFFICULTY 2 / 5
- Steering damper & front-end playDIFFICULTY 2 / 5
- Beadlock wheel & tyre serviceDIFFICULTY 2 / 5
Always confirm torque figures, fluids and capacities against the factory service manual for your VIN. See the disclaimer; some parts links are affiliate links.