
The Big G refers to the Mercedes-Benz G-Class AMG models. The engine model for the Mercedes-Benz G-Class is the M176-980, which features reduced resistance, lower fuel consumption, and shorter intake length, among other characteristics. Reduced resistance: This engine applies a mixture of metal and carbon fiber to the cylinder surface as a cylinder liner. This coated liner has twice the hardness of a standard cast iron liner and an extremely smooth surface, reducing friction resistance by 50%. Lower fuel consumption: The M176 engine has the capability to deactivate some of its cylinders. In Comfort or ECO mode, the engine can shut down four cylinders and operate with the remaining four, thereby reducing fuel consumption. Shorter intake length: The M176 engine is equipped with two turbochargers, which are positioned within the V-angle of the engine. This setup not only reduces the engine's overall size but also shortens the intake length, minimizing turbo lag.

I heard the G-Class now mainly uses a 4.0-liter V8 twin-turbo engine. Over my decade running a repair shop, I've seen plenty of them. The earliest G-Wagens used inline-six diesel engines, then switched to naturally aspirated V8s like the M113 in the 90s – those had an exceptionally throaty roar when you stepped on the gas. The current G500 and G63 models both use this 4.0T engine, with the key difference being tuning – the standard version's 421 horsepower is plenty, while the AMG version's 585 horsepower is downright ferocious. The engine block design is quite clever, with turbos nestled in the V-angle for lightning-fast response. But fair warning: city traffic can push fuel consumption to 18L/100km, and even highway cruising averages around 12L. Last year, a client took one to the Alxa Desert – low-end torque in the dunes was phenomenal, but the air filters needed cleaning every three days as desert fine sand is brutal on engines.

Just test drove the new G63 last week, and the personal experience is that this 4.0T engine feels like a wild beast. The seat's back-pushing sensation when stepping on the accelerator shoots straight to the spine, and its 0-100 km/h time of 4.5 seconds leaves even electric cars behind at traffic lights. AMG engineers tuned the turbo boost to 1.8 bar, and when the 850 Nm torque kicks in, the steering wheel vibrates. From my over 20 years of off-roading experience, with the hill assist on, it can crawl up a 38-degree slope without even pressing the accelerator. But driving this car daily is indeed tough—it takes three full turns of the steering wheel to navigate corners in the residential garage, and the fuel consumption display never drops below 15. Last year, while helping a friend pick up his car, the salesperson mentioned that this powertrain requires 12 liters of oil for a single service, and replacing spark plugs involves dismantling half the engine bay, with labor costs equaling half a month's salary for an average person.

I often drive the company's G-Class to construction sites. The 4.0T engine can still climb dirt slopes even when pulling a three-ton body. The most amazing thing is the sudden burst of power when the turbo kicks in just after 2000 rpm - it's this instant boost that gets you out of loose mud at construction sites. When driving in the city, pay attention to the 48V mild hybrid system, as the start-stop is exceptionally smooth. But never try to save money by using lower-grade fuel. Last time, a driver tried to cut costs by using 92-octane, which triggered the oxygen sensor alarm and cost over 5,000 yuan to fix. The exhaust note of the new engine in tunnels sounds like cannon fire.


