M-Class (W164) Produced 2006-2011: ML280CDI, ML320CDI, ML420CDI, ML350, ML500, ML550

Transfer case and Differential fluid service not required?

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Old Jul 7, 2011 | 05:33 PM
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2008 ML 350 PII, heated seats, running boards, ipod adapter, cd changer
Transfer case and Differential fluid service not required?

I've got an '08 ML350 with 36K miles. The dealer has recommended doing the transfer case fluid service ($65) around 40K miles and then says that the differential service ($110 total for front and rear) needs to be done at 60K miles.

These are all very small amounts but I hate wasting money on things that aren't needed. The manual does not call for those services at all. So, I called MB's corporate office and was told that unless there's fluid loss, MBUSA does not require doing these services at all.

Can any of you think of any compelling reason to ever do them?

Last edited by am1996; Jul 8, 2011 at 11:20 AM.
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Old Jul 8, 2011 | 03:08 PM
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'10 CL550, '12 GL550
They're leaking or they've been under water.
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Old Jul 8, 2011 | 03:14 PM
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2008 ML 350 PII, heated seats, running boards, ipod adapter, cd changer
Originally Posted by lkchris
They're leaking or they've been under water.
You mean you'd do the service if they are leaking? Why? Why not just have them add fluid if there's a leak, which is already part of Service A and B.

Last edited by am1996; Jul 8, 2011 at 03:36 PM.
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Old Jul 9, 2011 | 03:44 PM
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If they were leaking I'd have the leak fixed. This would be a warranty fix if age/miles are right.
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Old Jul 12, 2011 | 03:39 AM
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2002 E430
Transmission, Transfer case, differential require service at 39K miles. I had then done for $700 ish before I traded it in for '11.
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Old Jul 19, 2011 | 12:29 AM
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His 2019 RAM Cummins Turbo Diesel Laramie; Her's 2007 ML320 CDI P3; Mine BMW R1200R
I plan on keeping mine for a while, so I plan on dif service at 100K miles.
You better do the transmission at 40K with the new spec fluid or else.
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Old Jul 25, 2011 | 03:30 PM
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2008 ML 350 PII, heated seats, running boards, ipod adapter, cd changer
Originally Posted by KA8
Transmission, Transfer case, differential require service at 39K miles. I had then done for $700 ish before I traded it in for '11.
The manual clearly states that transmission service is required at 39K miles. There's no argument about that. It says nothing about transfer case and differential service and, as I posted above, Mercedes-Benz corporate has confirmed to me that these services are not required at all.

Where are you seeing that transfer case and differential require to be serviced at 39K miles?
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