ML430 Differential gear oil DIY - Page 5 - Mercedes-Benz Forum
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#41 (permalink) Old 02-28-2010, 10:48 PM
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Hmmm, my dealer only charged me $1.37 for one.
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#42 (permalink) Old 05-08-2010, 11:38 AM
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Originally Posted by drivbiwire View Post
No, use 85w90 there is a darn good reason for it, one of them being the film strength required to prevent wear on the gears.

You could use Conventional 0w20 engine oil and the gears will last 50,000 miles, whats your point?

My point is that you used the incorrect fluid that is too thin to prevent wear on the gears. Also given the high loads imposed on these differentials given the weight of the MB vehicles I strongly urge you to go to the dealer and purchase the correct fluid and change it out immediately.

Mobil 1 Synthetic Differential fluids:
(40C is approx the average temperature of a differential during normal operation)

85w90 @ 40C = 153 cSt (Required)
75w90 @40C = 106 cSt

Frankly that is BIG no make that a HUGE difference in viscosity when viscosity is THE critical factor in respect to providing the required protection from metal to metal contact.

The only difference is that as the fluid gets hotter the two viscosity ranges converge minimizing the overall benefits of the thicker fluid this is also when the base stock quality comes into play.

To put this in perspective it would be like running a 0w20 in an engine that requires 5w40, you just don't unless you want to rebuild the unit.
Here is some info taken from MB Star Service regarding differential oil. It is about W211, but it says that will apply to previous years/models. MB is using 75w-85, not 85w-90 synthetic oil on E class.
Attached Files
File Type: pdf w211 differential oil.pdf (136.9 KB, 169 views)
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#43 (permalink) Old 10-18-2010, 11:10 AM
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I did this service over the weekend. I didn't even need to use ramps/stand as you can easily get to the diffs without them.

Front: Piece of cake. Easy access to everything and easy re-fill.

Rear: This is a little tighter area. Test your 10mm socket on the fill plug first as the frame is right in the way and my socket & wrench wouldn't fit on my truck like in the video. Perhaps because I did it on the ground? Anyway, I just had to use a standard hex wrench to remove the fill plug. Also it was easier to just attach a short piece of tubing to the bottle (4-5 inches) to re-fill rather than contort the bottle into the space.

I just reused the o-rings. They were in great shape and sealed back up fine.

All in all, a super simple DIY!

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#44 (permalink) Old 11-04-2010, 04:49 AM
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Excellent!
When do you change gear oil? What's the recommended mileage.?
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#45 (permalink) Old 03-03-2011, 07:04 AM
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DETANE you rock!!!

Great video DETANE that was very nice of you to go through the nice work and with a cam in your hand I def couldn't do it as good btw great music too But here's my question to you, I called 2 Benz dealers(1 in Canada and 1 in Detroit) and they both did not recommend changing the Diff oil unless it was leaking saying it's a "life fill".. I know that's what they say about the tranny flush also but I still did it on my 02 ML500 as soon as I bought it.. But how much benefit does changing the Diff Fluid give you or the car in return?? Gas Mileage?? Besides the prolonged protection of the diff system parts..
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#46 (permalink) Old 03-03-2011, 07:21 AM
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@Moe - it's piece of mind knowing it has been done. The oil isn't pricey...and it only takes 20 minutes...it's worth it. They also said the Tranny was life fill - see how that turned out for alot of us.

Detane...nice job on the DIY. I like the music choices too.

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#47 (permalink) Old 03-03-2011, 08:13 AM
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Quote:
Originally Posted by moe_clk500 View Post
I called 2 Benz dealers(1 in Canada and 1 in Detroit) and they both did not recommend changing the Diff oil unless it was leaking saying it's a "life fill".
Is it necessary? Perhaps not.

But it certainly wont hurt. There really isn't a downside and it's crazy simple to do.

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#48 (permalink) Old 03-03-2011, 04:09 PM
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To naybody wondering about the diffs.
The diffs are not life fill. 5 years or 60k miles.

Please look at the PDFs in this thread post # 10. The PDFs apply to all W163s.
http://www.benzworld.org/forums/w163...ge-yes-no.html
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#49 (permalink) Old 11-21-2011, 01:59 PM
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Thanks - it was easy.
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#50 (permalink) Old 04-19-2013, 07:28 AM
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What are the torque settings for the bolts ?
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