What is the engine model of the S600?

[OLogan]

The engine model of the S600 is 256-925, with a maximum power of 230 kW, maximum torque of 450 Nm, maximum horsepower of 313 Ps, and a maximum power speed of 5500 rpm. The S600 engine is independently developed and produced by Mercedes-Benz. For daily maintenance of the S600 engine, the following methods can be used: Use lubricating oil of appropriate quality grade. For gasoline engines, select SD--SF grade gasoline engine oil based on the additional equipment of the intake and exhaust systems and usage conditions; for diesel engines, choose CB--CD grade diesel engine oil according to mechanical load, with the selection standard not lower than the manufacturer's requirements; Regularly change the oil and filter. The quality of any grade of lubricating oil will change during use. After a certain mileage, performance deteriorates, causing various problems for the engine. To avoid failures, change the oil regularly based on usage conditions and maintain an appropriate oil level; When oil passes through the fine pores of the filter, solid particles and viscous substances in the oil accumulate in the filter. If the filter is clogged and oil cannot pass through the filter element, it may rupture the filter element or open the safety valve, allowing oil to bypass through the bypass valve and carry contaminants back to the lubrication area, accelerating engine wear and increasing internal contamination; Regularly clean the crankcase. During engine operation, high-pressure unburned gases, acids, moisture, sulfur, and nitrogen oxides from the combustion chamber enter the crankcase through the gap between the piston rings and cylinder walls, mixing with metal powder from component wear to form sludge. In small amounts, it remains suspended in the oil; in large amounts, it precipitates, clogging filters and oil passages, making engine lubrication difficult and causing wear; Regularly use radiator cleaner to clean the radiator. Removing rust and scale not only ensures the engine operates normally but also extends the overall lifespan of the radiator and engine.

[Everdeen]

I remember the engines used in the Mercedes-Benz S600 varied significantly across different years. Back in the 1990s, the W140 version was equipped with the M120 engine—a 6.0-liter V12 that remains a classic to this day, though it's notoriously high-maintenance. By the early 2000s, the W220 model switched to the M137 engine, still a V12 but with the displacement reduced to 5.8 liters. What impressed me most was the W221 from 2006 to 2013, which adopted the M275 twin-turbocharged engine. Despite the drop to 5.5 liters, it delivered even more power. Most older S600s on the road today feature this setup, known for its quick acceleration and quiet operation. Starting with the 2014 W222 model, Mercedes introduced the M279 engine—a 6.0-liter twin-turbo V12 producing over 600 horsepower, marking the end of Mercedes' naturally aspirated V12 era. If you're looking to buy used, it's crucial to verify the year and corresponding engine model.

[DelCassandra]

When it comes to the S600 engine, my experience with old Mercedes models is that you need to distinguish between generations. The first-gen V12 was the M120, an all-aluminum 6.0-liter unit used in 1990s 'Tiger Head' Benzes—finding parts for it now is nearly impossible. The second generation, called M137, had a slightly adjusted displacement of 5.8 liters and was used in models around 2002, offering slightly better fuel efficiency than its predecessor. The truly groundbreaking one was the M275 series, which debuted in 2006 and served for over a decade. Though labeled as 5.5 liters, its twin-turbo setup delivered exceptional power, achieving 0-100 km/h in just over 4 seconds. What impressed me most was its smoothness—you couldn’t even feel vibrations at red lights. Before the facelift, the W222 switched to the M279 engine, featuring direct injection and twin turbos, which actually reduced fuel consumption by 10%. Anyone who’s into Mercedes knows the V12 is the soul of the S-Class.

[KylieLee]

The Mercedes-Benz S600 has primarily utilized four models of V12 engines. The early M120 engine, introduced in 1992, was purely naturally aspirated with a 6.0-liter displacement, which now appears outdated in terms of technology. During the millennium update, it was replaced by the M137, which incorporated electronic throttle control and variable valve timing. The true comprehensive innovation came with the 2006 M275 model, which introduced twin-turbocharging, boosting horsepower to 517 hp, making this generation the most durable. Finally, in 2014, it was updated to the M279 model, which, although labeled as 6.0 liters, actually had a displacement of 5980cc, with the notable feature of replacing the distributor with an independent ignition system. All these engines feature a 12-cylinder layout, delivering particularly smooth acceleration at high speeds. It's important to note that the S600 was gradually phased out after 2017, with the AMG S65 now serving as the flagship model.

[SanConnor]

When discussing the S600's engine, the year matters. The first-generation model in the early 1990s used the M120 engine, which had a deep exhaust note but terrifying fuel consumption. The 2002 facelift switched to the M137 engine – though smaller in displacement, it actually delivered higher power output. Personally, I find the 2006-2013 models most practical, equipped with the M275 biturbo V12 producing a massive 830Nm of torque. Floor the pedal and you get intense acceleration without turbo lag. The later improved M279 engine upgraded to direct injection for quicker response. Both generations share one trait: enormous physical size requiring half the engine bay to be dismantled for repairs. Owners should religiously change coolant – overheating is the V12's mortal enemy. With Mercedes' full electrification now, these big-displacement V12s have become extinct.

[SanAnastasia]

As the flagship of Mercedes-Benz, the S600's engines across generations have been technological benchmarks. The initial M120 model required over ten liters of engine oil, giving mechanics headaches. With the introduction of the M137 in the new century, maintenance costs dropped significantly, but true practicality came with the 2006 launch of the M275 twin-turbo engine. This engine's standout feature was its ability to deliver maximum torque at low RPMs, making city driving exceptionally smooth. Later, the M279 model incorporated piezoelectric fuel injector technology for more refined power delivery. These V12 engines share the common advantage of extreme smoothness, cruising at less than 2,000 RPM on highways, making long-distance travel particularly effortless. In the used car market today, be cautious of pre-2007 models that may burn oil, while post-2011 improved versions have far fewer issues.