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Steering Fluid Change 2000 E320

8265 Views 31 Replies 11 Participants Last post by  cerritos
This might be an easy question, but how do I change/replace the steering fluid on a 2000 E320? I know where the steering fluid housing is with the dip stick level check as the cover.

I am hearing minor squeaking noises when I turn the wheel in either direction at low speeds or stationary. The steering fluid change may not eliminate the noise, but I figured it wouldn't hurt. I have checked the fluid level and it is at max level.
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Do you just use a regular suction to get the fluid out? According to specs, the reservoir holds about 1.3 quarts of steering fluid. Could that all be suctioned out - or most of it? I am assuming that using MB Steering Fluid is a must!
I hear the steering squeaky noise only after the car is warmed up - driven about 1 hour or so. What could be the source of the problem? This is a 2000 E320 with 38K miles. Anyone with a similar experience, please shed some light!
Thanks for the reply Spine911. What is puzzling me is the fact that the noise is only heard after the car is driven for a while. If it is some plastic/rubber thing rubbing or the steering wheel itself, wouldn't the noise be there all the time?
You got it right! I'm impressed - You've been following my threads I see. The steering wheel noise is the last thing I need to fix before I ship it! Here is what I have done to it so far:

1. Added a CD Changer
2. Replaced leather with a wood shifter
3. Replaced leather with a wood/leather wheel
4. Replaced car mats
5. Painted intake manifold
6. Painted drums and brake calipers (green)
7. Installed a new set of michelin's
8. Installed chrome headlight rings
9. Replaced head lights with white lights
10. Detailed it (mostly paint touch-ups and wax)

It looks and feels like new now. It even smells new. I JUST NEED TO FIX THE STEERING NOISE!!!!!!!!!!!!
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Thanks for the reply. I will try the screwdriver trick today. What do you mean by checking the steering column as well? Do you mean the part between the brake and gas pedals? And again, why do I get the noise only after the car has been driven for a while?

Mr. Pie,
I used a high-temp engine spray paint (1200 C) from Autozone. I was told that the brake caliper paint is just a marketing term to command a higher price. The key to a successful brake caliper paint job, in my experience, is PATIENCE! On the W210 (and most cars really), the front brake calipers are bigger than the back ones and subsequently show better through the wheels. Take your time cleaning them well. I used WD40 first, followed by a wheel cleaner, and finished by another generic degreaser. I then rinsed well and waited until fully dried. Next I really masked the area well using newspaper and plastic grocery bags. Make sure you cover the brake pads as well. Finally, I sprayed a few quick sprays. In case of overspray, you can use a nail polish remover.

I have the stock drums and mine looked rusty through the wheels so I also masked and sprayed them black on all 4 wheels. The back drums are much wider and show rust really bad.
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Mr. Pie,

Yes you do need temperatures between 50 and 80 or so for the paint to cure right. You also have to let it dry for a day or two before driving it. I have the luxury of driving my wife's car (Nissan Quest[:(!]) whenever I want, so I let mine dry for 4 days to be sure.

I used a floor jack to be able to lift up high enough to use two jack stands (I did the front two wheels first). Make sure you prevent the other wheels from rolling! You can also use the stock jack if you have low enough jack stands OR use the stock jack and do one wheel at a time, but that would be a pain in the rear.
I didn't take pictures of the caliper paint job. I should've taken before and after pictures. I will try and take a few shots soon but with the wheels on.

I still didn't hear from anyone as to why I hear the steering squeaky noise ONLY after I drive the car for about a 1/2 hour or more. Any insights here is appreciated.
Did they show you or do you know where the dry boot is? Do you have to keep lubricating it?

To answer your question, I will be changing my steering fluid either today or tomorrow. I tried yesterday but I didn't have the "correct" suction device (I tried to use one from my wife's kitchen!). I will let you know what happens.
I still have the steering squeaky noise... I managed to siphon out only 300 ml of the steering fluid so I replaced it with new fluid. The spec calls for over a quart so somehow I was not able to siphon out most of the oil. I used a regular, manual pump from Autozone. So today, I took the car to an independent Mercedes shop. The mechanic told me ahead of time that if he gets into the wheel he might not be able to fix the problem anyway. I was so desperate so I gambled, and lost... It cost me an hour of labor and the problem is still there. The mechanic was able to determine that it is not the steering pump or the boot needing lubrication. He isolated the noise to the black plastic part that attaches to the steering wheel. It's attached to the car by two screws. He took it out and showed it to me. It has one moving part and one stationary part. As he manually rotated the moving part, I could hear grinding noise but not squeaking. He said it might sound different once the wheel is on. And so he air sprayed it and lubricated it. In the end, I was out $77, 1 hour of down time, and the same problem [:(!] I DON'T KNOW WHAT TO DO!!!!!!!! I'm not the type to give up so I'm going to continue to research this thing. Once again, any help here is appreciated.
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Hey I just thought I'll update this thread by the fact that the steering noise has suddenly disappeared!!!!!!! I can't believe it. Of course, it might come back. I did not do anything more than described here. It just disappeared!
As you face the engine, the PS reservoir is right below the right hand side front corner of the plastic manifold cover. In fact, you would have to either remove the manifold plastic cover or just slightly bend it to unscrew and remove the PS reservoir cover.
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