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Dealer and Indy shop both say they don't drain torque convertor

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Old Apr 25, 2015 | 11:32 PM
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Dealer and Indy shop both say they don't drain torque convertor

Dealer where I bought car quoted a price of $525 to do trans. fluid change. Well-respected independent shop in New Jersey quoted $465. Both said "we don't drain convertor on 2012 C300 4matic". I don't get it.

Last edited by stratman1954; Apr 25, 2015 at 11:34 PM.
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Old Apr 27, 2015 | 01:07 AM
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Originally Posted by stratman1954
Dealer where I bought car quoted a price of $525 to do trans. fluid change. Well-respected independent shop in New Jersey quoted $465. Both said "we don't drain convertor on 2012 C300 4matic". I don't get it.
They are cheaping out go somewhere that does it properly. When you change your oil do you do only half?
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Old Apr 27, 2015 | 09:06 PM
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I called the next closest dealer today and guess what, they don't do it either.
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Old Apr 27, 2015 | 09:27 PM
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I wonder why is this so inconsistent
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Old Apr 28, 2015 | 12:24 AM
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I would call Mercedes customer care and ask them why so many dealers don't do it. It's possible that it has been revised by Mercedes as acceptable... long shot. But would be curious as to what they would have to say considering it's their cars they have to warranty due to incorrect service procedures from the dealer possibly.
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Old Apr 28, 2015 | 02:27 AM
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Wasn't there an actual letter from MB headquarters saying that they needed to drain the converter? Print that out and bring it with you, nothing else to be said with that letter.
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Old Apr 28, 2015 | 09:55 AM
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Does the torque convertor even have a drain plug? Rather hard to drain without the plug.


FWIW, my '99 722.6 tranny has a drain plug on the convertor. My '05 722.6 torque convertor does not.


There are ways around this but it involve more work. I was reading a post on it in the last few days but don't recall where. Search is all I can recommend.
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Old Apr 28, 2015 | 10:33 AM
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99.9% sure there is a drain plug. Dealers and techs are being lazy. There are "WIS" documents that clearly state that the TC must be drained and how to do it. See several other threads on this topic in this forum, also reference the switch to new "blue" fluid for the 722.9plus transmission.
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Old Apr 28, 2015 | 11:09 AM
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Originally Posted by bbirdwell
Does the torque convertor even have a drain plug? Rather hard to drain without the plug.


FWIW, my '99 722.6 tranny has a drain plug on the convertor. My '05 722.6 torque convertor does not.


There are ways around this but it involve more work. I was reading a post on it in the last few days but don't recall where. Search is all I can recommend.
Yes it does, the 722.9 trans has a drain plug for the TQ with the exception of the ones in the S-class earlier on
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Old Apr 28, 2015 | 09:05 PM
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Originally Posted by Knightmare69
Wasn't there an actual letter from MB headquarters saying that they needed to drain the converter? Print that out and bring it with you, nothing else to be said with that letter.




Could you tell me how to get this letter?
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Old Apr 28, 2015 | 10:12 PM
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Originally Posted by global33
99.9% sure there is a drain plug. Dealers and techs are being lazy. There are "WIS" documents that clearly state that the TC must be drained and how to do it. See several other threads on this topic in this forum, also reference the switch to new "blue" fluid for the 722.9plus transmission.
This is a totally false statement.

It is hit or miss if the tq converter has a drain plug first of all. Only way to know is to rotate it over and look.

Second , blue fluid is in no way compatible with earlier red fluid.
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Old Apr 28, 2015 | 10:42 PM
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Originally Posted by stratman1954
Could you tell me how to get this letter?
Do a search on this subforum, it was a hot topic a while ago.
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Old Apr 29, 2015 | 09:52 AM
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Originally Posted by Shifter
This is a totally false statement.

It is hit or miss if the tq converter has a drain plug first of all. Only way to know is to rotate it over and look.

Second , blue fluid is in no way compatible with earlier red fluid.
The OP's car is a 2012. Some early 722.9 didn't have a plug on the TC, but I'd bet money that there's one on his car.

I never said to mix red and blue fluids. 722.9 uses 236.14(red) and 722.9PLUS uses 236.15(blue). 722.9PLUS was introduced mid 2010.
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