Is the OM603 reliable?
Reliable: 3. Liter Inline-6 OM603 Engine People love this motor that had its run from 1986 to 1997. Despite its characteristics to be worthy of being plonked into a G-Class, this robust diesel engine was actually used in various Mercedes luxury sedans like the W124, W125, and W140 Series. OM606 Reliability and Proven Performance The Mercedes OM606 turbodiesel is celebrated for its extraordinary durability and dependability. Its iron-block construction, sturdy internal components, and well-engineered cooling and lubrication systems allow it to withstand harsh conditions and deliver long-term reliability.OM-601s can be just as reliable as the old OM-61X family for hundreds of thousands of miles if properly maintained (OM-602s and OM-603s have their own inherent issues due to their design variations on the OM-601).
What replaced the OM606?
The OM613 is a turbocharged straight 6 diesel engine produced by Mercedes-Benz. It is the successor to the OM606 and was replaced by the OM648 engine in 2003. OM606 is known for easy maintenance, but like any engine, it requires regular attention to run it at its best. Here are some important points to keep in mind: Common oil change: Change oil every 10,000 to 15,000 km to ensure even operation and prevent engines from wearing.