DIFF SERVICE
Thread Starter
Junior Member
Joined: Aug 2008
Posts: 39
Likes: 0
C63, BMW E46 M3
DIFF SERVICE
After reading the threads on this forum I thought I was safe with my diff service. I was able to get the right fluid put in at the dealer but according to my invoice I was not charged for new plugs, which to me means my old ones were reused. I did not know about the service bulletin which requires new plugs to get used. I have placed a call to the service manager to address this and am waiting his call back. What do I need to worry about at this point?
I swear these dealerships have no clue about the cars they sell. If it wasn't for me being proactive and insisting I see the bottles of the diff fluid they were going to use my diff would have ,for sure, been ruined.
I swear these dealerships have no clue about the cars they sell. If it wasn't for me being proactive and insisting I see the bottles of the diff fluid they were going to use my diff would have ,for sure, been ruined.
Super Member
Joined: Jul 2008
Posts: 583
Likes: 23
From: Colorado
2021 E63 S Sedan
When my service manager pulled up the official MB "LSD diff care guide", it said to replace the DRAIN plug and not reuse the old plug "to prevent a potential future leak". My guy will not replace the fluid without getting the plug first, just as I would not let him anyway. They are not normally stocked and must be ordered from Germany.
Thread Starter
Junior Member
Joined: Aug 2008
Posts: 39
Likes: 0
C63, BMW E46 M3
When my service manager pulled up the official MB "LSD diff care guide", it said to replace the DRAIN plug and not reuse the old plug "to prevent a potential future leak". My guy will not replace the fluid without getting the plug first, just as I would not let him anyway. They are not normally stocked and must be ordered from Germany.
Super Member
Joined: Jul 2008
Posts: 583
Likes: 23
From: Colorado
2021 E63 S Sedan
Strafe, do you think you can get a copy or its ref number. The service mgr told me he was trying to find this TSB as he had never heard of that before. He says his foreman doesn't know of this and could not find it from MB. This was late Fri evening. He says they will check with MB on Mon and call me back. If this is the case they will do the service again and change the plug. I don't know if they're BSing me or not but I would like to have this TSB in hand if possible. Thanks.
MBWorld Fanatic!
Joined: Mar 2007
Posts: 2,408
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It may not be an actual "service bulletin", in the sense of an identified problem that needs correction. It is more of a "instructions for service". When they pull up C63 ('09) and LSD oil change, a set of instructions and warnings come up. The instructions state the type of oil to be used (Castrol SAF XJ 75w-140), and the MB part number. The warnings are several, one of which states the need to replace the drain plug for the reasons previously stated. My service manager apologized to me for not reading the service guide more closely. I suspect the mechanical LSD's are new to Mercedes, hence their inexperience with the proper procedures! Hope this helps! If your guy needs more help, he can call my guy.
Super Member
Joined: May 2008
Posts: 850
Likes: 1
From: NYC
2009 C63 AMG Black on Black PP Package CF fully loaded
Most dealers are Not up to speed with everything MBUSA throws at them. I had questioned (Foreman lead mechanic @ one NYC dealer), its scary how clueless they are when it comes to a AMG... That is one of the reasons why I made a last minute switch to a larger first class NY/NJ area MB dealer. Don't let the manager or sales person convince you that they have the best service bc they are full of crap 1/2 of the time, see for yourself first hand where and who will be servicing your car. This will in the long run save you time and Head aches...
Senior Member
Joined: Jul 2008
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CLK Black
Unless they service PP AMG's the SL65 or G55 on a regular basis they may not have ever done this.....
It seems ot be catching dealers off guard to say the least.
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MBWorld Fanatic!
Joined: Mar 2007
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I have always serviced the differentials on my cars, LSD or not.
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