A V12 engine block is a complex structural entity. Tightening the cylinder head bolts in the wrong order can warp the head or crack the block. The manual contains detailed diagrams showing the specific numerical sequence required to ensure even pressure distribution. This level of detail is rarely found in third-party guides.
The last pages of the genuine cover safety shutdowns. Pay attention to the "Überdrehzahl" (Overspeed) section. If you ever perform a rack adjustment on the injection pump incorrectly, the V12 can run away (run on lube oil). The manual specifies the exact location of the emergency air shutoff flap. Do not operate the engine without verifying this flap works.
For full technical details and maintenance schedules, the following digital resources are commonly cited: How to Service and Repair Your MWM TBD 232 Engine
Download the PDF to two devices—a tablet in the workshop (sealed in a waterproof case) and a laptop in the office. When you need to rebuild that V12 injection pump at 2 AM during a power outage, you won't have time to search the internet.
The MWM TBD 232 is durable but suffers from specific age-related issues. The PDF manual provides diagnostic trees for these: