Differential service
Thread Starter
Super Member
Joined: Nov 2008
Posts: 684
Likes: 2
From: Dallas TX area
M5, C63, 335Ci
Differential service
Has anyone with a PP equiped car done the diff fluid service themselves? I am planning to do this service at the local MBCA chapter DIY next weekend and wanted to make sure that I need a 17mm hex bit socket to do it. It's my understanding that the drain and fill plugs are 17mm hex, but I wanted to confirm before buying the tool.
TIA
Mike
TIA
Mike
Thread Starter
Super Member
Joined: Nov 2008
Posts: 684
Likes: 2
From: Dallas TX area
M5, C63, 335Ci
Asking the dealership is the next step. I have heard some got this done gratis from MBUSA, but I was quoted over $300 for it and since the parts are less than $70 and about 1/2 hr of my time I can't get myself to pay them $500 / hr. Hell I don't even charge that much to my clients!
MBWorld Fanatic!
Joined: Jun 2002
Posts: 1,249
Likes: 17
From: Chicagoland, IL
09 C63
You don't have to work on anything other than reading skills - I believe it's firmly spelled out in the warranty booklet that it is included. Don't let them bully you and force you to pay!
Trending Topics
MBWorld Fanatic!
Joined: Nov 2008
Posts: 1,624
Likes: 107
From: SoCal
2018 AMG GTR, 2017 GLS63, 2019 C63s
Can you refer to a page where this is noted please? I am not able to find this anywhere. Thank you.
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
MBWorld Fanatic!
Joined: Jun 2008
Posts: 4,455
Likes: 31
From: Ny
Anything W/4Wheels
have them change it and then flip them the finger. it said on my owners booklet that the will change it for free and i dont even have a lsd. but then agin they dint change mine its ok ill get a lsd soon.
Member
Joined: Jun 2008
Posts: 230
Likes: 0
2009 Black C63 AMG
I just completed the LSD service myself, as well as an oil and filter change/service. I did it last Thursday at the local auto crafts shop. My differential fill and drain bolts are 19mm and not 17mm as you stated. The plugs are standard hex type nuts, not the recessed type. I assumed that they were recessed and was pleasently surprised that they were normal bolts. The process itself is quite easy, with many DIY tips all over the internet. The hardest part for me was removing the correct plastic skid plate to access the engine oil drain plug, which is 13mm. Another piece of info that might help is the oil filter composite top is a 32mm nut. Lastly, a Torx T25 will remove the air filter housing, allowing you to lift the oil filter out of it's housing. I hope this helps. 
Last edited by RM-6302; Jan 25, 2009 at 01:56 AM. Reason: Add info
Junior Member
Joined: Mar 2007
Posts: 28
Likes: 0
Just paid $168 for the diff oil change at my dealer, they said it is not? covered under warranty. Anyone have proof otherwise that I could show my dealer? Also make sure you remind them that the plug needs replaced.
Super Member
Joined: May 2008
Posts: 850
Likes: 1
From: NYC
2009 C63 AMG Black on Black PP Package CF fully loaded
I had my LSD oil replaced last week, I reminded the dealer about the type of oil to use along with the plug. I was told after it was complete that the plug did Not need replacing... Any reason why the metal bolt needs replacing after a LSD oil change if done right?
Thread Starter
Super Member
Joined: Nov 2008
Posts: 684
Likes: 2
From: Dallas TX area
M5, C63, 335Ci
The drain plug is aluminum and upon torquing to factory specs the threads become distorted. This is why the procedure calls for a new plug.
Super Member
Joined: May 2008
Posts: 850
Likes: 1
From: NYC
2009 C63 AMG Black on Black PP Package CF fully loaded
Is this procedure anywhere in our manual? after all was said and done the dealer/ mechanic I spoke with said there was no need for replacement, he said the metal bolt was fine...unless its documented somewhere I can't complain or can I?
Thread Starter
Super Member
Joined: Nov 2008
Posts: 684
Likes: 2
From: Dallas TX area
M5, C63, 335Ci
It's not in the manual, but the service bulletin on this from MB specifies a new bolt be used. I had the tech pull it up on the computer wheil I was doing mine at the local MBCA DIY session to get the proper torque and it specifically states to "install the new drain plug" and to tighten to 50 nm tq.
Super Member
Joined: May 2008
Posts: 850
Likes: 1
From: NYC
2009 C63 AMG Black on Black PP Package CF fully loaded
MBWorld Fanatic!
Joined: Apr 2005
Posts: 1,424
Likes: 0
From: Northern NJ
2009 C63
Super Member
Joined: May 2008
Posts: 850
Likes: 1
From: NYC
2009 C63 AMG Black on Black PP Package CF fully loaded
It's not in the manual, but the service bulletin on this from MB specifies a new bolt be used. I had the tech pull it up on the computer wheil I was doing mine at the local MBCA DIY session to get the proper torque and it specifically states to "install the new drain plug" and to tighten to 50 nm tq.
BTW... they said 2 bolts not 1
Junior Member
Joined: Jun 2008
Posts: 37
Likes: 0
From: Calgary, Alberta, Canada
2009 C63 AMG
Does anyone have a copy of this Service Bulletin? My dealer is saying the bolts don't need to be changed either, they said they looked for this bulletin but didn't find anything.
