The Mercedes Benz OM602 OM603 Engine Complete Workshop Service Repair Manual is your comprehensive guide to servicing and repairing these powerful engines, covering models from 1987 to 1996. This manual is designed to empower you to perform repairs with confidence, saving you time and money.

This manual provides detailed, step-by-step instructions and clear illustrations for every service and repair procedure. It covers all aspects of servicing and repairing your Mercedes Benz OM602 or OM603 engine, ensuring you have the information you need to tackle any task, from routine maintenance to complex repairs.

Whether you're a seasoned mechanic or a DIY enthusiast, this manual will serve as your essential companion. It's packed with valuable information, including detailed diagrams, troubleshooting tips, and specifications.

The Mercedes-Benz OM602 and OM603 engines were a series of inline five-cylinder and six-cylinder diesel engines produced by Mercedes-Benz from 1985 to 1996. Known for their robust construction and reliability, these engines found their way into a wide range of Mercedes-Benz vehicles, including the 190E, W124 E-Class, W126 S-Class, and even the G-Wagon. They were available in various displacement options, ranging from 2.5 liters to 3.0 liters and featured a cast iron block and aluminum cylinder head. The OM602 was the five-cylinder variant, while the OM603 was its six-cylinder counterpart. The engines were renowned for their smooth operation and impressive fuel economy for their time. They employed a sophisticated fuel injection system and a turbocharger for enhanced performance and efficiency.

The Mercedes-Benz OM602 and OM603 engines were designed to provide a balance of performance and durability. Their robust construction, including a cast iron block and aluminum cylinder head, made them highly resistant to wear and tear. These engines were praised for their smooth operation, particularly in the OM603 six-cylinder version, which offered a refined and comfortable driving experience. Their fuel efficiency was another notable characteristic, contributing to their popularity among owners who valued a blend of performance and economy. However, these engines were not without their challenges. Some common issues included injector failures, turbocharger problems, and head gasket leaks. Despite these potential downsides, the OM602 and OM603 engines have a reputation for longevity and remain popular choices for enthusiasts seeking reliable and well-built diesel power in their classic Mercedes-Benz vehicles.