Materials Needed:
- New oil filter (check your owner's manual for the correct size and type)
- New oil (check your owner's manual for the recommended oil type and quantity)
- Oil drain pan
- Funnel
- Wrench
- Rags
- Jack and jack stands (optional, if you can't comfortably reach the oil drain plug)
Changing the Oil:
1. Prepare your vehicle. Park your Mercedes S350 on a level surface, turn off the engine, and engage the parking brake. If necessary, lift your vehicle using jack stands or ramps to reach the oil drain plug more easily.
2. Locate the oil drain plug. Depending on your vehicle's model year, the oil drain plug may be under the vehicle, or it may be accessed through a hole in the underbody panel.
3. Place the oil drain pan under the drain plug. Position the oil drain pan directly under the oil drain plug to catch the old oil as it drains.
4. Loosen the oil drain plug. Use a wrench to loosen the oil drain plug counterclockwise until it comes off. Be prepared for the old oil to start draining, so allow sufficient clearance for your hands and other body parts.
5. Let the old oil drain. Allow all of the old oil to drain from the engine completely. This might take a few minutes.
6. Replace the oil drain plug. Once the old oil has completely drained, replace the oil drain plug. Tighten the plug until it feels snug.
7. Locate the oil filter. The oil filter is usually located near the top of the engine, but its exact location may vary depending on your vehicle's model. Once you find it, use a wrench to loosen it counterclockwise and remove it.
8. Apply a thin coat of new oil to the gasket of the new oil filter. This creates a seal between the oil filter and the engine.
9. Screw on the new oil filter. Hand-tighten the new oil filter until it feels snug. Do not overtighten the oil filter, as this can cause damage.
10. Open the oil fill cap. The oil fill cap is usually located at the top of the engine. Remove the oil fill cap.
11. Add new oil to the engine. Using the funnel, pour the new oil into the engine. Add the amount of oil specified in your vehicle's owner's manual. Be careful not to overfill the engine with oil.
12. Close the oil fill cap. After adding the new oil, replace the oil fill cap. Make sure the cap is tightly closed to prevent oil leaks.
13. Start the engine and check for leaks. Start the engine and let it run for a few minutes. Check underneath the vehicle for any oil leaks. If you see any leaks, tighten the oil drain plug or oil filter until the leak stops.
That's it! You have now successfully changed the oil in your Mercedes S350. If you are not comfortable performing these steps yourself, it's best to consult with a certified mechanic or take your vehicle to a reputable automotive service center.
