This manual covers the Mercedes-Benz 722.3 and 722.4 4-speed automatic transmissions, predominantly used in Mercedes-Benz vehicles from the early 1980s through the mid-1990s. These transmissions were integral to a wide range of models, including the W123, W124, W126, W201 (190E), R107, and early R129 chassis, often paired with various gasoline and diesel engines. Known for their robust engineering and smooth operation, these transmissions represent a significant era in Mercedes-Benz's development of durable and reliable powertrains. The 722.3 typically features vacuum modulation, while the 722.4 incorporates early electronic control, both designed to deliver dependable performance.

This comprehensive repair and service manual provides detailed information essential for the maintenance and repair of the 722.3 and 722.4 automatic transmissions. It covers all critical aspects, including torque converter, planetary gear sets, clutch packs, brake bands, hydraulic control units, oil pumps, and associated systems. The manual includes step-by-step instructions for disassembly, assembly, and rebuilding, along with diagnostic procedures, troubleshooting guides, and adjustment specifications. It is designed to assist enthusiasts, DIY mechanics, and professional technicians in understanding, maintaining, and repairing these transmissions, ensuring their continued longevity and optimal performance.