M 139 it may be a seemingly abstract alphanumeric designation, but behind it is the most powerful production four cylinders they can buy.
Available with two power levels, 387 hp and 421 hp , this is the heart of the AMG 45 range, and you can only find it in MFA-derived models, ie from the A 45 to the CLA 45, with others most likely to join later.
The M 139 is assembled in Affalterbach by hand, by just one person, respecting the “one man, one engine” principle. Despite manual assembly, the production line breathes sophistication, with the introduction of new digital technologies to assist employees.
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The entire production line has been adapted to Industry 4.0 methods, incorporating the latest discoveries in ergonomics, materials handling, quality assurance, sustainability and efficiency. Result: increasing quality of the final product, and optimized working conditions for employees — win, win...
We leave two videos, the first one, shorter (highlighted), allows you to have an overview of the new M 139 production line. The second video (below), allows you to follow the assembly from the beginning to the placement of the plate that identifies who mounted the engine.
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