Maybach 57S Coupe Xenatec 2005 Tramontana 2009 Tramontana R 2013 Tramontana XTR 2015 Tramontana S M158 The M158 is a version based on the M275. The engine uses smaller twin scroll type turbos (for reduced turbo-lag), a bespoke Bosch ECU, a modified intercooler configuration, and dry sump lubrication. It produces at 5800 rpm and of torque at 2250-4500 rpm. AMG builds this engine specifically for Pagani Automobili for use in the Huayra supercar. Later in BC model, M158 makes and . The Imola variant of the Huayra uses a version of the M158 producing and . The engine is mated to a new 7-speed electrohydraulic automated manual gearbox designed and built by XTrac. Applications: 2012–present Pagani Huayra M279 (Successor) In 2012, Mercedes-Benz delivered all the rights of V12 engine development to AMG for future V12-model vehicles. Starting the 2014 model year, M279 has been extensively redesigned and updated their top-of-the-range V12 engine to better conform to increasing emission standards in Europe and the United States. Despite the basic design being more than 16 years old (M137), the new engine has enough modifications and sporting character that the engineers felt it warranted a new engine designation. According to Mercedes-Benz, the most important features of the new engine are: - Increased displacement to - New forged pistons and forged crankshaft in high-grade quenched, tempered steel- New Engine Control Unit- New Ignition system- New Camshafts- Hollow-stem sodium outlet valves- Low-temperature cooling-water circulation system with separate expansion reservoir. With these modifications and the addition of Mercedes-Benz's 7G-Tronic transmission on the V12 models, it is estimated that fuel economy will rise about 21% on the European cycle for the large-bodied Mercedes vehicles. Power is now at and torque figures stay the same as the predecessor at . Applications: 2014–2020 S 600, S 600 Maybach and Maybach Pullman M279 AMG The M279 AMG is based on the new and comprehensively revised M279 engine series, specially tuned for AMG 65 and Maybach 650 models. In addition to that engine's updates from the previous M275, M279 utilizes new turbochargers with an increased spiral cross-section, new exhaust manifolds, new wastegate ducts, and new cylinder heads with optimized flow characteristics to increase the engine output to and still of torque. The multi-spark ignition with twelve double ignition coils and a new higher performing engine management system not only results in smoother running, but also enables even more effective combustion. The