This manual provides comprehensive diagnostic fault code information for Atego, Axor, and Actros commercial vehicles, spanning multiple generations from Atego I and II, Axor I and II, through Actros I, II, and III. These light, medium, and heavy-duty trucks and buses represent a significant portion of the commercial vehicle market, known for their robust engineering and operational reliability. The extensive coverage includes diagnostic trouble codes (DTCs) for all major electronic control units (ECUs) and their associated systems, such as engine management, transmission control, brake systems, chassis dynamics, and various comfort and information systems.

The primary purpose of this diagnostic reference guide is to serve as an essential resource for professional technicians, fleet managers, and service centers. It details the meaning, potential causes, and diagnostic implications of specific fault codes generated by the vehicle's complex electronic architecture. By offering detailed explanations and linking codes to specific ECUs and components, this manual significantly accelerates troubleshooting, reduces vehicle downtime, and enhances repair accuracy. Its structured format, likely organized by ECU or system, ensures efficient navigation, making it an indispensable tool for maintaining the optimal performance and safety of commercial vehicles.