Mmr1

Is Mobil 1 synthetic gear lube LS, good for a 2013 glk 4 matic ?

NYCGLK

For diffs? I think that's what 2014 E-class call for.

Mmr1

What can I use besides MB fluid

formerjeepguy

This is the authority:

https://bevo.mercedes-benz.com/beam.en.html

I think we use 235.7 spec gear lube.

https://bevo.mercedes-benz.com/bevolisten/235.7_en.html

Mmr1

Would the 235.7 be for the front differential also , since the mb site shows Rear Axle Gear, I would think they would be the same , front and rear differentials

Mmr1

I was looking to put in synthetic, the winters get cold here!

E55Greasemonkey

MB likes things to be complicated, most 4matics call for different fluids front and rear.

Mmr1

I read the front differential has no fill plug, so you are supposed to fill from the drain plug and just force in a specific amount ? Crazy

E55Greasemonkey

No, you are supposed to remove a CV axle shaft and fill through the opening. Obviously MB considers this a one time fill from the factory!

NYCGLK

Yep...0.6L. Measure how much comes out.
You can use the same screw in-adapter used to fill tranny, pump a bit extra to account of spillage. It's not as hard as it seems.

NYCGLK

nope, same front and rear on 2010 GLK and 2014 E350, so not sure what you are talking about

E55Greasemonkey

A quick search through WIS says you are correct about the GLK differential oils. However, on the larger SUV's (ML/GL) the oil spec is in fact different for front and rear differentials. Likely all the cars use the same fluid front and rear, since the GLK is a C-class platform, that makes sense.

NYCGLK

You sure? I have heard that Transfer case runs different fluid from the diffs. I think that was the case on 2015 ML350 but not 100 sure.

E55Greasemonkey

Yes, my 2008 ML350 uses the red ATF fluid in the transfer case. It does not share the same fluid supply with the transmission. The front and rear diffs definitely call for different fluids I'll find the chart and post it here.