The updated technology is aimed at ensuring a more dynamic driving experience as well as optimum active and passive safety. The 2010 S63 AMG and S65 AMG will be on-sale in the U.S. Exclusivity and dynamism, effortless superiority and high tech - both of the top-of-the-line S-Class models from Mercedes-AMG embody all of these characteristics. Volker Mornhinweg, Chairman of Mercedes-AMG GmbH: “Our discerning clientele appreciate the synthesis of uncompromising performance and dynamic, exclusive equipment, a unique proposition in this market segment. Powerful eight and twelve-cylinder engines are a traditional strength of AMG - and the S63 AMG and the S65 AMG are no exception. The S63 AMG is powered by a high-revving V8 naturally aspirated engine developing 518 hp, the S65 AMG is equipped with a biturbo V12 engine that delivers 604 hp. Developing a peak output of 518 hp at 6800 rpm and maximum torque of 465 lb-ft at 5200 rpm, the S63 AMG ranks among the most powerful series-production sedans with an eight-cylinder engine. These impressive figures translate into a high level of driving pleasure and exceptional performance.
The S63 AMG accelerates from 0 to 60 mph in 4.5 seconds before going on to a top speed of 155 mph (electronically limited). The V8 naturally aspirated engine offers an exhilarating mix of high power from low engine speeds, instantaneous responsiveness and pronounced high-revving flexibility - up to a maximum engine speed of 7200 rpm. The technical basis for the dynamic DNA comes courtesy of the thoroughbred motorsports technology of the AMG 6.3-litre V8 engine. This includes the lightweight, extra-rigid aluminum bedplate crankcase with closed-deck technology and the twin-wire-arc-sprayed coating on the cylinder walls used exclusively by AMG. The streamlined design of the intake and exhaust ducts together with the magnesium variable intake manifold featuring two parallel-action internal throttle flaps results in superlative cylinder charging and high power output. The 32 valves in the cylinder heads are operated by bucket tappets for a rigid valve train and high engine speeds. Continuous adjustment of the camshafts on the intake and exhaust sides ensures an optimal supply of fuel/air mixture to the eight combustion chambers.
Outstanding agility and instantaneous responsiveness are the undoubted strengths of the AMG 6.3-litre V8 engine, thanks in no small part to the electronically controlled fuel pump. It operates with an on-demand system pressure of 3.8 to 5.0 bar (55 to 72.5 psi). According to power requirements and external temperature, fuel pressure is adjusted and regulated almost instantly. The engine management system translates the command from the accelerator within milliseconds into the corresponding fuel pressure setting. Such control ensures rapid vehicle response and a sporty thrust across all load ranges and at all engine speeds. In the interests of optimal reliability, the S63 AMG has a particularly efficient water cooling system and large engine and transmission oil coolers. Located behind the openings in the AMG front apron, these coolers ensure non-critical operating temperatures at all times - even under the extreme stress of the racetrack. The AMG sports exhaust system with dual oval twin chromed tailpipes delivers the telltale eight-cylinder vocals. A twelve-cylinder engine has always been the pinnacle of the engine builders’ craft.
The torque has been reduced from 885 to 738 lb-ft out of consideration for the drivetrain and is available between 2000 and 4000 rpm. At a mere 1000 rpm, the AMG 6.0-litre biturbo V12 engine delivers 420 lb-ft of torque to the crankshaft, while 553 lb-ft are on tap at 1500 rpm. The performance figures are impressive testimony to the phenomenal power harnessed by the AMG twelve-cylinder unit: the S65 AMG accelerates from 0 to 60 mph in just 4.3 seconds; the top speed is 186 mph (electronically limited). Just as impressive as the phenomenal flexibility is the smooth and refined running characteristics which guarantee the high level of touring comfort traditionally associated with Mercedes. Like its stablemate the S63 AMG, fuel consumption on the new S65 AMG have been reduced thanks to optimization of the engine and transmission setup as well as improvements to the aerodynamics - all without compromising performance. The AMG 6.0-litre biturbo V12 engine also leverages the vast know-how amassed by Mercedes-AMG from the world of motorsports. The main and big-end bearings are also made out of improved materials to compensate for temperature and pressure peaks more effectively.
The charge cycle in the cylinder heads benefits from optimized combustion chambers and longer opening times of the intake camshafts. A modified oil pump ensures that all lubrication points are supplied with oil - even in highly demanding conditions. An engine oil cooler is integrated into the AMG front apron, with an additional engine coolant radiator located in the wheel arch. A typical feature of the AMG biturbo V12 engine is the sophisticated air/water intercooler. A large cooler at the front of the vehicle effectively cools down the intake air - which has been compressed by the turbochargers - before it enters the combustion chambers. The water-cooled low-temperature cooler results in a 25 percent reduction in intake temperature at full throttle and guarantees high power and torque output under all operating conditions and regardless of the outside temperature. The housings of the compressor and turbine in both turbochargers as well as the turbine and compressor wheels have been enlarged, resulting in a maximum charge pressure of 22 psi. The electronically controlled AMG-specific fuel pump operates with a variable system pressure of between 3.8 to 5.0 bar (55 to 72.5 psi).
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