* Model Years Vary: Mercedes 240D was produced over many years (1976-1985), and the engine and cooling system design may have differed slightly between model years.
* Engine Specificity: Even within the same model year, different engine options might have variations in the cooling system layout. You would need to know the exact engine code (e.g., OM616, OM617) to be sure.
* General Principles: While the specific direction may differ, the fundamental principle is that the coolant flows through the engine block and head to pick up heat, then circulates through the radiator to release the heat. The water pump is typically driven by the engine and pushes the coolant through the system.
How to Find the Correct Information:
1. Identify your specific 240D: You'll need the exact year and engine code.
2. Consult a Workshop Manual: The most reliable source is a factory service manual for your particular model year and engine. These manuals provide detailed diagrams and explanations.
3. Search Online: You can try searching for specific diagrams for your engine code online. However, always verify the source's reliability.
Important Note: Working with a car's cooling system involves potentially hazardous fluids and pressure. If you are not familiar with automotive systems, it's best to seek assistance from a qualified mechanic.
