Hydraulic reservoir on 300TE wagon - Mercedes-Benz Forum

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post #1 of 13 (permalink) Old 01-07-2009, 02:29 PM Thread Starter
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Hydraulic reservoir on 300TE wagon

I opened this reservoir today and it's completely dry.

Only mention in the owner's manual is one word: 'leveling'.

What is this fluid used for exactly (the suspension?), do I need to fill the reservoir asap and what is the best product to use?

TIA, Bill
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post #2 of 13 (permalink) Old 01-08-2009, 08:49 AM
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It's a very specific hydraulic fluid you can probably only get at a Mercedes dealer.

You can also online, of course.

Your rear "shocks" are not shocks but instead are load levelers, and your power steering pump has a second section that pumps this fluid to those load levelers to raise and level the rear end when weight is added. (I did NOT just say the fluid is power steering fluid.)

Of course since your reservoir is empty, filling it will most likely enable you to find where the leak is. You may also get a clue whether the pump has survived running dry.

Kent Christensen
Albuquerque
'07 GL320CDI
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post #3 of 13 (permalink) Old 01-08-2009, 11:37 AM
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Typical loss of fluid is a leak, which you should be able to find. The primary other source is the accumulator or sphere diaphram has ruptured allowing the fluid to displace the nitrogen in the sphere and has vented off since it is continual circulatig system.
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post #4 of 13 (permalink) Old 01-08-2009, 02:21 PM
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The fluid you need is A000 989 91 03 10 (part number).

There is a newer (better) synthetic fluid for self-leveling but your car only requires A000 989 91 03 10.
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post #5 of 13 (permalink) Old 01-08-2009, 05:15 PM
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Actually, the fluid is made for Mercedes by Febi-Bilstein and is also available in the US under their brand for quite a bit less than the dealership charges.

Check the Price You Pay for the Mercedes logo on the 1 L bottle

Last edited by MTI; 01-08-2009 at 05:25 PM.
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post #6 of 13 (permalink) Old 01-08-2009, 05:46 PM
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Some online MB dealers sell the stuff for about the same price as the Febi brand.

http://www.trademotion.com/partlocat...4660&year=2003

The above dealer sells for $10.88/liter.
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post #7 of 13 (permalink) Old 01-08-2009, 07:22 PM
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On older models I had the hoses deteriorating. Seems the hydraulic oil is the most aggressive from all oils since hydraulic hoses on my motorhome fail first as well
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post #8 of 13 (permalink) Old 01-13-2009, 07:14 AM
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I have a 1985 240TD W123 that was passed on to me by my father. The hydraulic systems no longer work when I got it and restoring it costs about $1,200. Since I find this too costly at this time is it possible to change it to standard Bilstein shocks for the W116 since the rear of the wagon is heavy. Is there a need for me to replace the coil springs suited for the W116 as well. Thanks in anticipation.
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post #9 of 13 (permalink) Old 01-13-2009, 07:23 AM
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Quote:
Originally Posted by jdfaustino View Post
I have a 1985 240TD W123 that was passed on to me by my father. The hydraulic systems no longer work when I got it and restoring it costs about $1,200. Since I find this too costly at this time is it possible to change it to standard Bilstein shocks for the W116 since the rear of the wagon is heavy. Is there a need for me to replace the coil springs suited for the W116 as well. Thanks in anticipation.
This has come up in the past especially on the Mercedes shop forum and the closed mercedeslist.com forum.

The consensus is do not do it, especially since you have already fixed yours. The system is pretty reliable and should last quite some time.

I have owned two wagons with this system and like it. When you need to haul some water softener salt or concrete, it is nice to see it maintaining the ride height.
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post #10 of 13 (permalink) Old 01-13-2009, 10:20 AM
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Thanks for your prompt reply. I forgot to make mention in my post that when I got the 240TD Wagon it no longer had the hydraulic shocks and the coil springs have already been replaced. I really need help on this. Bringing it back to original costs a lot of money which I do not currently have. I experience a lot of "thugs" on bad roads because the replacement shocks that my dad got have already given way.
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