Introduction

Learn to check your engine oil level. Don't let it get low; it's the life blood of your car!

Tools

Parts

Image 1/1: The W123 used in this guide is a diesel car so the dip stick is located near the large secondary fuel filter and the injector hard lines. The items around your dip stick may look different.
  • Oil level is checked using the engine oil dip stick. It is located on the right side of the engine when facing it from the front of the car.

  • The W123 used in this guide is a diesel car so the dip stick is located near the large secondary fuel filter and the injector hard lines. The items around your dip stick may look different.

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Image 1/1: Have a shop rag ready to catch any drips from the tip of the dip stick as it comes out of the tube it resides in
  • Pull the dipstick up and out towards the hood of the car.

  • Have a shop rag ready to catch any drips from the tip of the dip stick as it comes out of the tube it resides in

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Image 1/1: The oil level should fall somewhere between the notches on the tip of the stick. The notches mean:
  • The dip stick will come out with oil covering the tip. On a diesel engine it is normal for the oil to be dark black; the oil is designed to hold the diesel soot in suspension. If this were a gas engine it would definitely be time to change the oil just by the visual appearance of it! On a diesel you'll have to go more by age or mileage.

  • The oil level should fall somewhere between the notches on the tip of the stick. The notches mean:

    • Low - add oil

    • Full

  • If oil is at or below the Low notch add oil slowly, checking the level occasionally, until it reaches the Full notch.

  • Never overfill your engine with oil! Especially on a diesel. It can be pulled in to the cylinders and it could lead to a run-away engine.

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Image 1/1: To be sure of the oil level check it a second time after wiping it clean as outlined in steps 2 and 3.
  • Wipe the dipstick clean with a shop towel or other clean rag

  • To be sure of the oil level check it a second time after wiping it clean as outlined in steps 2 and 3.

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Image 1/1:
  • Return the dipstick to the tube when completed and be sure to push it all the way in until it seats properly in the tip of the tube.

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Conclusion

To reassemble your device, follow these instructions in reverse order.

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Nicolas Siemsen

Member since: 12/06/2013

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