This workshop manual covers Deutz BFM 1012/E and BFM 1013/E series diesel engines. These engines are known for their robust engineering and reliability, designed for demanding applications where performance and durability are paramount. The manual encompasses various engine configurations, including BF4M and BF6M variants, with both standard and E (electronic) designations, ensuring comprehensive coverage for a wide range of Deutz power units. The purpose of this manual is to provide detailed technical information for the maintenance, repair, and overhaul of these Deutz engines. It includes essential specification data, step-by-step procedures for checking and adjusting components, instructions for the repair of individual parts, and guidance on the disassembly and reassembly of the complete engine. Specialized tools required for these operations are also outlined, making this a vital resource for technicians and mechanics seeking to ensure optimal engine performance and longevity.