The reason M-B has the info about balancing the old flywheel to the new flywheel is to prevent an out-of-balance condition that will lead to bad vibrations. An engine that is out-of-balance and vibrating can cause damage to the engine, the drive train, and to other components. Have you called the local M-B dealership or independent M-B repair shops to see if any of them have the static balancing equipment? You're also going to need to look at the pilot bearing to do this swap.
Why do you think the M-B tech info is propaganda? From your info you apparently work at a business associated with or doing repairs on cars. Would you ignore tech info related to what your business does knowing that problems will result?
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