The Mercedes-Benz M275 (and similar M285) engine is a twin-turbocharged and intercooled, all-aluminium, 60° V12 automobile piston engine family used in the 2000s to the 2010s. It is loosely based on the M137 naturally aspirated V12 sold between 1998 and 2002, and retains its SOHC, 3 valves per cylinder, twin-spark ignition layout, but differs with the addition of structural reinforcements to the engine block for improved rigidity which in turn yields greater reliability. The M275 V12 Bi-Turbo engine was modified with the addition of larger turbochargers. Several variations of the M275 V12 Bi-turbo engine have powered many top-of-the-range Mercedes-Benz and Maybach models since 2003.

M275

Bore and stroke is 82x87 mm giving a displacement of 5513 cc. Power output ranges from 368 kW to 380 kW at 5000 rpm and 800 Nm to 830 Nm of torque at 1800–3500 rpm. Applications:

M275 AMG

The first V12 from AMG was dubbed M275 AMG - a 5980 cc version, with boost pressure reaching 22.1 psi at maximum, and uses air-to-liquid intercoolers. Bore and stroke are increased to 82.6x93 mm. Output is 450 kW or later 463 kW at 4800–5100 rpm with 1000 Nm of torque at 2000–4000 rpm. It uses an ECI ignition system for the two spark plugs per cylinder, which helps with combustion and to support Ionic current measurement function sequence. The top of the range variant fitted in the SL 65 AMG Black Series, which is equipped with 12% larger turbochargers, generates 670 PS at 4800–5400 rpm and 1200 Nm of torque at 2200–4200 rpm. However, due to the torque abundance to power the rear wheels, the SL65 Black is still limited to 1000 Nm. Applications:

M285/M285 AMG

The M285 and its AMG version of this 5513 cc engine built in Stuttgart, Germany specifically for Maybach badged products. Bore and stroke is 82x87 mm. Output is from 410 kW at 5250 rpm with 900 Nm of torque at 2300-3000 rpm to 463 kW (630 PS; 621 hp) at 5250 rpm with 1000 N·m (764 lb·ft). The cylinders are lined with silicon/aluminium, and uses fracture-split forged steel connecting rods. Spanish supercar manufacturer Tramontana uses a 5.5-liter, twin-turbocharged M285 AMG engine in its cars. On the top model, the Tramontana XTR, it produces 653 kW (888 PS; 881 hp) and 1,100 N·m (809 lb·ft). The Tramontana C, S and R also feature this V12 in a lower output trim, with outputs ranging from 550-720 hp. Applications: M285: M285 AMG:

M158

The M158 is a 5980 cc version based on the M275 AMG. 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 730 PS at 5800 rpm and 1000 Nm 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 764 PS and 1100 Nm. The Imola variant of the Huayra uses a version of the M158 producing 838 PS and 1100 Nm. The engine is mated to a new 7-speed electrohydraulic automated manual gearbox designed and built by XTrac. Applications: