* Engine variations: Mercedes-Benz E240 models from 2003 might have different engine options (e.g., V6, V8). Each engine has its specific oil requirements.
* Service history: The oil type and viscosity recommended for your car depends on its service history, mileage, and climate you live in.
* Owner's manual: The most accurate information about the proper oil for your E240 is in the owner's manual. It will specify the recommended viscosity and type (synthetic, mineral, etc.).
Here's what you should do:
1. Consult your owner's manual: This is the most reliable source of information.
2. Check with a qualified Mercedes-Benz mechanic or dealer: They can access your car's service history and give you the most accurate recommendation.
3. Use a reputable oil brand: Look for oil meeting the specifications outlined in your owner's manual or by your mechanic.
Remember, using the wrong oil can damage your engine. It's crucial to get this information right!