09whitec63

Hey everyone
I was under the car and noticed the rear diff plug leaking so I might as well do an oil change on the diff and replace the plug.
What kind of oil does everyone recommend and why??

Thanks
Cheers

BLKROKT

Depends on if you have an LSD or regular open diff.
LSD = Castrol Syntrax Limited Slip 75W-140
non-LSD = https://mbworld.org/forums/c63-amg-w...ml#post6580478

Also see this thread - cheap and effective mod while you're in there. https://mbworld.org/forums/c63-amg-w...l-cooling.html

AMG3.2

What's the recommended service interval for replacing the fluid? 50K? 60k?

09whitec63

I have the lsd in the car. Having issues finding how much oil to put in. Any help is much appreciated.

Jasonoff

~2 quarts. Keep pouring until it starts to come back out then install the fill bolt.

Mort

If you are buying 500ml Castrol Syntax LS 75W - 140 get 3 and you will have a little left over.

arrowskartax9

What is the oil grade for non limited slip diffs?? Or can the Castrol Syntrax Limited slip 75w-140 diff oil be used.

BLKROKT

Dude see the link above

arrowskartax9

Got it, Thanks.

arrowskartax9

Can you use Fuchs Titan Sintopoid LS SAE 75W-140 instead of Castrol Syntrax ?

bluejae

posting this in here because i didn't want to start a new thread

the 2 plugs drain/fill are required to be replaced with brand new ones? locally i'm getting quoted $40~ a plug... that's gotta be some advanced plug...

Mort

I changed the diff oil twice in my 2010 and just reused the plugs. They did not leak at all. Just snug them up and don't over tighten them. Two to three wraps of teflon tape should help seal them up if you are worried about leaks.

bluejae

thanks. that's what i did as well. hopefully it holds up

Jake215

Every 40K miles for LSD. Had mine done maybe a month or so ago.

Vladds

I changed the oil in my non limited. the plugs went back in and don't leak. However, it developed a small swat/leak at the rear cover gasket.
I'm going to try to re-torque the cover bolts.
Getting to that gasket may mean having to drop the diff.

spawnywhippet

I've just bought an 09 C63. How can I tell if the car has a LSD? There is no mention of it in any of the paperwork I got.

Jasonoff

If you can easily do this then it has one...

spawnywhippet

LOL, are there any methods I can do in the garage without getting arrested? :-)

AMGonFire

yes jack the rear up. Put the car in neutral. Spin one of the tires by hand if the other wheel spins in the same direction you have an lsd.

tphss

Get your VIN decoded for your options. You can find online, or if you contact MB USA customer support they will email it to you for free.
Regarding the differential fluid change, I did a flush today and it took just over 1.5L, I purchased 4 small bottles of the Castrol each 500mL (original from the dealer) and my mechanic told me most of the forth bottle was left.

Alex.currie44

Best answer and in addition to finding out about the LSD you will have the whole picture about your car.

bhamg

While you're at it you could do this too.

https://mbworld.org/forums/c63-amg-w...-type-lsd.html