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Inleiding

The most often neglected fluid and filter on the W123 cars is the power steering fluid and power steering filter.

Learn to change yours today, and extend the life of your pump and steering gear box.

  1. How to Change Mercedes W123 Power Steering Fluid and Filter, How to Change Mercedes W123 Power Steering Fluid and Filter: step 1, image 1 of 1
  2. How to Change Mercedes W123 Power Steering Fluid and Filter: step 2, image 1 of 3 How to Change Mercedes W123 Power Steering Fluid and Filter: step 2, image 2 of 3 How to Change Mercedes W123 Power Steering Fluid and Filter: step 2, image 3 of 3
  3. How to Change Mercedes W123 Power Steering Fluid and Filter: step 3, image 1 of 1
    • With the lid removed you can see that this fluid is a bit low, and is also very dark/dirty.

  4. How to Change Mercedes W123 Power Steering Fluid and Filter: step 4, image 1 of 2 How to Change Mercedes W123 Power Steering Fluid and Filter: step 4, image 2 of 2
    • Remove the nut holding down the spring and plastic retainer, if present. On some cars, there is just a spring as shown in the second picture which should be removed.

    • The nut on this car is a 10mm.

  5. How to Change Mercedes W123 Power Steering Fluid and Filter: step 5, image 1 of 1
    • Now use your fluid extractor, or turkey baster (never use it in the kitchen again!) to remove enough fluid to get easy access to the filter.

    • Dispose of the fluid in your drain pan.

  6. How to Change Mercedes W123 Power Steering Fluid and Filter: step 6, image 1 of 1
    • Remove the filter using a pair of needle nose pliers.

  7. How to Change Mercedes W123 Power Steering Fluid and Filter: step 7, image 1 of 3 How to Change Mercedes W123 Power Steering Fluid and Filter: step 7, image 2 of 3 How to Change Mercedes W123 Power Steering Fluid and Filter: step 7, image 3 of 3
    • See how nasty this is? This may be the original filter, almost 30 years old...

    • Nice fresh filter picture, ready for install.

  8. How to Change Mercedes W123 Power Steering Fluid and Filter: step 8, image 1 of 1
    • With the filter out, you can remove the remainder of the fluid in the reservoir.

  9. How to Change Mercedes W123 Power Steering Fluid and Filter: step 9, image 1 of 1
    • Install your new filter. Install it with the holes facing upwards, as shown.

  10. How to Change Mercedes W123 Power Steering Fluid and Filter: step 10, image 1 of 1
    • Replace the spring, retainer and nut over the filter and tighten down. The spring should still have some room to expand and contract but should be snug.

    • Fill the reservoir to the bottom of the metal rim around the top of the pump housing.

    • This car is getting power steering fluid, instead of automatic transmission fluid. Both are OK. The power steering fluid is clear.

    • Now, turn on the engine. Be sure the car is in park or neutral first. Turn the steering wheel left and right, as far as it will go, a few times to get out any air.

    • Top off the fluid as needed. Never let the pump run dry.

    • If your fluid is very dirty, simply repeat the process of sucking out fluid, putting the filter back in, filling the reservoir, and then running the engine and turning the wheel until it looks clean.

    Great job keep up the good work!

    cbelle1 - Antwoord

    Hallo, ich bräuchte die MB Teilenummer für die Deckeldichtung. Hat die hier jemand? :)

    Max VOGEL - Antwoord

Conclusie

Finish by re-installing the cap and taking it for a test drive.

20 andere personen hebben deze handleiding voltooid.

Nicolas Siemsen

Lid sinds: 06-12-13

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10 Opmerkingen

I find this tutorial so simple to follow. I prefer images and text to video. Well done!!!

Holden Belmont - Antwoord

Holden, I am glad it was helpful! I agree, I usually prefer good pictures and text to a video - no need to rewind when you miss something.

Nicolas Siemsen -

Agreed. Very well done !

susan vernon - Antwoord

Thank you so much for your detailed guides! What sort of symptoms could we expect if the power steering fluid or filter need replacing?

Angel Jon Camama - Antwoord

This was so professional; technical writers take notice!

Brian Graham - Antwoord

Good job plain and simple thank you

Mike - Antwoord

Question: Why do I need to jack up the car? Can't I just turn the wheels with the tires on the ground?

David Ballard - Antwoord

You could. However, turning the wheels while the car is on the ground and not moving puts substantial strain on the pump. If the front wheels are hanging freely in the air that is not an issue. Your pump, your car, your choice :) I would jack it up.

Nicolas Siemsen -

Beautifully explained and illustrated.

Thank You for helping our old cars on the road.

Terry Harris

thar1914 - Antwoord

How often should you ideally replace the fluid and filter? I’m guessing every other year…

Paul Alexander - Antwoord

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