Specs, fluids & service · 1999–2012

Mercedes-Benz G 55 AMG 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.

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Spec sheet

CHASSIS	W463
YEARS	1999–2012 (US MY2002–2011)
ENGINE	M113 5.4 L V8 / M113K supercharged
OUTPUT	354 PS → 507 PS
TORQUE	525 Nm → 700 Nm
GEARBOX	722.6 5-speed automatic
DRIVE	Full-time 4WD, low range
LOCKERS	Centre, rear, front
AXLES	Solid, front & rear
0–100 KM/H	7.4 s → 5.5 s
TOP SPEED	210 km/h (limited)
SUCCEEDED BY	G 63 AMG (2012)

By year

YEARS	PLATFORM	ENGINE	OUTPUT	NOTES
1999–2004	W463 G 55 AMG	M113 E55 5.4 L V8	354 PS · 525 Nm	Naturally aspirated; US MY2002–2004
2004–2006	W463 G 55 AMG Kompressor	M113K 5.4 L SC V8	476 PS · 700 Nm	Supercharged; US from MY2005; 0–100 km/h ≈ 5.6 s
2006–2008	W463 G 55 AMG Kompressor	M113K 5.4 L SC V8	500 PS · 700 Nm	Power bump; OE tires 285/55R18 in the US
2008–2012	W463 G 55 AMG Kompressor	M113K 5.4 L SC V8	507 PS · 700 Nm	New ECU, three-bar grille, 19-inch wheels, COMAND APS; last US MY2011
2012–2018	W463 G 63 AMG	5.5 L biturbo V8	544 PS	Replacement; US from MY2013

Fluids, capacities & service intervals

Baseline everything the week you buy it. The G 55 adds an AMG engine, and from 2005 a supercharger with its own low-temperature intercooler circuit, to a W463 chassis that still needs knuckle, axle and diff-lock care. Note which engine you have: 2003–04 US trucks are naturally aspirated, 2005-on are Kompressor (M113K), and several parts differ.

ITEM	SPEC / CAPACITY	INTERVAL	NOTES & PARTS
Engine oil & filter	MB 229.5 · 0W-40 or 5W-40 full synthetic · ≈8.5 L (9 qt) with filter on 2005+ Kompressor; ≈8.0 L (8.5 qt) on 2003–04	Then yearly or at the service indicator	Same top-mounted cartridge filter as the M113 G 500. If an oil cooler is drained you'll need extra oil.Liqui Moly 5W-40 oil change kit, 9 L AMG + filter (G 55 2005–10) · FCP Euro ↗Mann oil filter kit HU 718/5 x (000 180 26 09) · FCP Euro ↗
Air filters	Kompressor: 113 094 00 04 elements · 2003–04: 273 094 04 04 set	Now, then every second oil change	A dirty filter costs a supercharged engine more than an NA one — don't stretch it.Hengst air filter 113 094 00 04 (G 55 2005–11) · FCP Euro ↗Hengst air filter set 273 094 04 04 (M112/M113) · FCP Euro ↗
Cabin filter	Mahle/OE 463 830 00 18	Now, then yearly	Mahle cabin air filter 463 830 00 18 · FCP Euro ↗
Spark plugs, wires & coils	16 plugs (twin-plug heads) · Kompressor: NGK ILFR6A / Bosch FR6MPP332 · 2003–04: Bosch FR8DPP33	Now if no record confirm in manual	Fix any misfire before adding boost; check coil boots for oil from the valve covers.NGK ILFR6A spark plug (G 55 Kompressor, need 16) · FCP Euro ↗Bosch FR8DPP33 spark plugs, set of 16 · FCP Euro ↗Bremi ignition wire set 112 150 00 · FCP Euro ↗
Intercooler circuit & pump (2005+)	Separate low-temp coolant circuit · MB 325.0 coolant	Replace the pump as routine if it's original; bleed the circuit afterwards	Heat-soak power loss in traffic is the pump. An upgraded higher-flow pump is a bolt-in.Bosch intercooler pump kit with coolant (G 55 2005–11) · FCP Euro ↗Intercooler pump upgrade (Johnson CM-30) · GwagenParts.com ↗
Engine coolant & thermostat	MB 325.0 coolant, 50/50 with distilled water · ≈12.7 L	Now if history is unknown	Bleed thoroughly; inspect the hoses near the supercharger for heat damage.Genuine Mercedes thermostat 113 203 02 75 (G 55 2005–10) · FCP Euro ↗
Automatic transmission (722.6)	MB 236.14 ATF · ≈9 qt total fill (pan drain replaces only part)	Now if no record; then every 40,000–60,000 mi (common technician practice)	New filter and pan gasket, and replace the 13-pin connector sleeve. Fill by temperature with the dipstick tool; check the conductor plate if shifts are erratic.FUCHS 722.6 ATF service kit (fluid, filter, gasket) · FCP Euro ↗FUCHS 722.6 13-pin connector service kit · FCP Euro ↗
Transfer case	Check the tag: many W463 cases take MB 236.14 ATF; earlier cases ran GL-4 gear oil confirm in manual	Now, then every 60,000 mi (MB interval quoted by owners)	Drain and fill plugs are 14 mm hex. Inspect the flex discs and centre bearing — 500 hp is hard on them.FUCHS ATF 4134 (MB 236.14), 1 L · FCP Euro ↗
Front & rear differentials	GL-5 hypoid gear oil (synthetic 75W-90 commonly used) · front ≈1.4 L, rear ≈1.8 L (AMSOIL 2006 G 500 data) confirm in manual	Now, then with the transfer case	Loosen the fill plug before draining. On mid-2000s trucks the centre lock is vacuum and the axle locks hydraulic — test each lock separately afterwards.Red Line 75W-90 GL-5 gear oil (1 qt) · FCP Euro ↗Genuine Mercedes differential drain plug 901 997 05 35 · FCP Euro ↗
Front knuckles, wheel bearings & seals	Repack knuckles; check bearings and axle seals	If no record (Europa's interval was 40,000 mi)	Oil on the front brakes means axle seals — on brakes this size, fix it immediately.Genuine Mercedes front wheel bearing, outer 009 981 48 05 · FCP Euro ↗Genuine Mercedes front wheel seal 463 334 01 59 · FCP Euro ↗Genuine Mercedes front axle shaft seal 009 997 28 47 · FCP Euro ↗
Power steering fluid	MB power-steering fluid or Dexron III ATF · 1 L	Now	Febi power steering fluid (MB 000 989 88 03) · FCP Euro ↗
Brake fluid	DOT 4 Plus (MB sheet 331.0)	Now, then every 2 years	Bleed the hydraulic axle-lock lines too confirm in manual.Genuine Mercedes DOT 4 Plus brake fluid, 1 L · FCP Euro ↗
Fuel filter	2005–10: 002 477 27 01 · 2003–04: 002 477 30 01	Now if no record confirm in manual	Genuine Mercedes fuel filter 002 477 27 01 (G 55 2005–10) · FCP Euro ↗Mann fuel filter 002 477 30 01 (M112/M113) · FCP Euro ↗
Engine & transmission mounts	Fluid-filled engine mounts + transmission mount	Inspect now; replace as a set if collapsed or leaking	High-output trucks wear them quickly; a clunk on take-off is the tell.Genuine Mercedes engine mount 460 240 70 18 · FCP Euro ↗Lemförder transmission mount 212 240 04 18 · FCP Euro ↗

Capability

Towing	7,000 lb (3,175 kg) braked; spec data for a 2005 G 55
Fuel tank	25.1 US gal (95 L) 2011 G 55
Fuel economy	EPA 12 city / 14 hwy (2003); 11 city / 13 hwy (2005 and 2011 Kompressor)
Curb weight	5,540 lb (2,513 kg) 2005 G 55 spec data
0–100 km/h	7.4 s (naturally aspirated) → 5.6 s (Kompressor)
Top speed	210 km/h (130 mph), limited

Wheels & tires

Factory tire	285/55R18 (US trucks through 2008) · 275/55R19 on 9.5-inch AMG wheels (2009 update)
Bolt pattern	5x130
Center bore	84.1 mm
Lug thread	M14x1.5 bolts
Biggest tire · Stock	275/70R18 (≈33 in)
Biggest tire · 2.5 in (60 mm)	33 in
Biggest tire · 4 in (100 mm)	35 in

Open the G 55 AMG in the tire fitment tool →

Common G 55 AMG repairs

Always confirm torque figures, fluids and capacities against the factory service manual for your VIN. See the disclaimer; some parts links are affiliate links.