E-Class (W124) 1984-1995: E 260, E 300, E 320, E 420, E 500 (Includes CE, T, TD models)

Differential Fluid

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Old Dec 17, 2004 | 06:11 PM
  #1  
Nick_M_51988's Avatar
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From: Modesto, CA
1992 400E (86 300E, 98 S420) - Retired
Differential Fluid

changing my differential fluid today, but was wondering how much i should replace it with. Any Brand recommendations?

thanks alot.
Nick
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Old Dec 20, 2004 | 10:35 AM
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I like Redline synthetic....got rid of the 'howl' that my 190E 2.6 and 500E once had.

OEM stuff is just fine though.
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Old Dec 20, 2004 | 10:47 AM
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2000 E320 Sedan
Use MB authorized only to avoid any issues.
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Old Dec 20, 2004 | 11:40 AM
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Thumbs up

Very true...MB does recommend ONLY their stuff...

I think ALL manufacturers prefer you use their stuff, for what gain is ceratinly debatable...more probably linked to money and quality control...which shouldn't be a problem if you do your homework and choose a decent aftermarket product that has been proven to be as good if not better than OEM.

Last edited by Jim's500E; Dec 20, 2004 at 11:43 AM.
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Old Dec 22, 2004 | 07:14 PM
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How do I change the diff. oil

Nick, Is it a easy job to change diff. oil? How did you do it? Thanks.
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Old Dec 23, 2004 | 01:23 AM
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From: Modesto, CA
1992 400E (86 300E, 98 S420) - Retired
yes it was fairly simple. if you can change oil you can do this.
i took the pan off to remove some sludge and i also had a leak.
i scraped off all the RTV sealant and replaced it. Make sure you do this.
i just drove it up on some ramps to do this. it was easy to do i i feel some extra ponies that i didn't have before. i highly recommend this.
i used some Mobil 1 Fluid 85W-90 weight. NON synthetic. mercedes DOES NOT recommend using synthetic. did it along with an oil change in about an hour.
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Old Dec 23, 2004 | 01:24 AM
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1992 400E (86 300E, 98 S420) - Retired
oh and FYI the mercedes differential oil is Mobil 1. same as the oil. mercedes uses Mobil Products and slaps their name on it.
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Old Jan 3, 2005 | 11:51 AM
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91 e30 318is, 92 e30 mtechnic
the users manual says to use 85w 90, but redline only makes 75w90. Do ya'll have notice any problems?
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Old Jan 3, 2005 | 11:51 AM
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91 e30 318is, 92 e30 mtechnic
Originally Posted by Nick_M_51988
oh and FYI the mercedes differential oil is Mobil 1. same as the oil. mercedes uses Mobil Products and slaps their name on it.

what about power steering fluid?
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Old Jan 4, 2005 | 03:05 AM
  #10  
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From: Modesto, CA
1992 400E (86 300E, 98 S420) - Retired
Originally Posted by nrddct
what about power steering fluid?
I'M not sure, but if were you, talk to your stealer-ship. find out for us. most mobil products are approved by mercedes. but i wouldn't take a chance.

also on synthetic oil, i know it has been approved by mercedes to use it as
Brake Fluid
Motor Oil
and tranny oil (only on 90-93 models for some reason.)
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