GL Class (X166) 2013-2015 after facelift became GLS (X166)

Front & Rear Differential GL450

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Old Oct 13, 2022 | 11:10 AM
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2013 GL450
Front & Rear Differential GL450

Hi,

I am going to change the front & rear differential fluids on my 2013 GL450. (114k miles)

I had the dealership recently change the transmission and transfer case fluid.

It looks like it takes 3 quarts of 75W 85 fluid. The local dealer fluid is $67 per quart.

Is it worth using the Mercedes fluid or what alternative fluid would you recommend? Can you confirm the recommended weight?

I’ve used Mobil 1 gear oil on other vehicles.

Thank You
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Old Oct 13, 2022 | 11:28 AM
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Xavier Smith II's Avatar
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2010 C63 AMG, 2015 GL450, 2018 GLS 550, 2021 GLS 450
Isn't there a center diff even on the non offroad units?
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Old Oct 13, 2022 | 09:28 PM
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2017 GLE350 4MATIC
Originally Posted by landon27
Hi,

I am going to change the front & rear differential fluids on my 2013 GL450. (114k miles)

I had the dealership recently change the transmission and transfer case fluid.

It looks like it takes 3 quarts of 75W 85 fluid. The local dealer fluid is $67 per quart.

Is it worth using the Mercedes fluid or what alternative fluid would you recommend? Can you confirm the recommended weight?

I’ve used Mobil 1 gear oil on other vehicles.

Thank You
Use MB fluids as specified on the operating fluids site. https://operatingfluids.mercedes-benz.com/

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Old Oct 13, 2022 | 09:29 PM
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2017 GLE350 4MATIC
Originally Posted by Xavier Smith II
Isn't there a center diff even on the non offroad units?
Yes. All 4MATIC vehicles have a center differential.
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Old Oct 15, 2022 | 09:00 PM
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2013 GL450
Originally Posted by chassis
Yes. All 4MATIC vehicles have a center differential.
Is this also the transfer case or something separate?

I had them change the transmission and transfer case fluid and I believe they both received transmission fluid.
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Old Oct 15, 2022 | 09:42 PM
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2017 GLE350 4MATIC
G/ML/GL/GLE/GLS use "hang-on" transfer cases with a center differential. Fluid is not shared between transmission and t/case.

Sedans and GLK/GLC use integrated transfer cases with a center differential. Fluid is shared between transmission and t/case.

All 4MATIC vehicles have center differentials and transfer cases. The implementation details are different for larger SUVs vs smaller SUVs and sedans.

The transfer case on your GL uses "transmission fluid", with a different MB spec designation than the transmission itself. The hang-on t/case is sealed and has its own fluid, not shared with the transmission.

Last edited by chassis; Oct 15, 2022 at 09:45 PM.
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