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.

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.

[3] Applications: The M285 and its AMG version of this 5.5 L (5,513 cc) engine built in Stuttgart, Germany specifically for Maybach badged products.

The engine uses smaller twin scroll type turbos (for reduced turbo-lag), a bespoke Bosch ECU, a modified intercooler configuration, and dry sump lubrication.

[10] The engine is mated to a new 7-speed electrohydraulic automated manual gearbox designed and built by XTrac.