DIY 722.9 7G-tronic 7-speed automatic transmission service thread

Last edited by Glyn M Ruck; Jan 12, 2012 at 12:05 PM.
Last edited by Domm; Mar 17, 2012 at 09:33 PM.

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Are there any EARLY symptoms or signs that 4Matic owners can report just before their transfer case/tranny failed? Is their anything they have in common with each other? What should we be looking for, such as a low hum (or whine) when silently cruising?
PS: Time to think about unloading our GLK if this is a REAL concern. We're keeping our fingers crossed with our brand new 2012 C300 4Matic.
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Are there any EARLY symptoms or signs that 4Matic owners can report just before their transfer case/tranny failed? Is their anything they have in common with each other? What should we be looking for, such as a low hum (or whine) when silently cruising?
PS: Time to think about unloading our GLK if this is a REAL concern. We're keeping our fingers crossed with our brand new 2012 C300 4Matic.


I was lucky it failed just 2 months prior to warranty expiring... Time to unload 4matic and settle for std RWD...
I've contacted a local independent shop (whom has a god reputation) and they quoted me $441 (and I specifically asked about the torque convertor).
Clearly the dealership's $220 seems too good to be true. Another question: Would it be wrong to schedule the dealership service at $220 and if afterwards find they only replaced less than 9 qts of fluid demand they do the job right at no extra cost? After all their service website clearly states "Complete flush" for $220. Any thoughts?
Thanks,
Troy
I have a 2005 e500 with 63000 miles, and have been reading much about the transmission issues. I have had two adaptations and still experience what is at times a hard shift into and out lower gears. The problem is more prevalent when the vehicle is "cold". I have a couple questions:
1) what could be other (hopefully less costly) issue?
2) i have heard that mbusa may help if you have less than 100k. if I do need a valve body and have less than 100k miles how do I contact mbusa to ask for assistance?
3) my vehicle hasn't gone into to limp mode, but can any major issues form with not having a 100% valve body (if that is what it is)?
Also, I have also read you MUST have a full transmission service. I am not certain if mine has ever had one. Would this be recommended? What is generally involved and a price point? I have also read that it is not advised to have what I can term a "forced flush". Is there any other kind?
Thank you!
Read more: https://mbworld.org/forums/c-class-w...#ixzz2JbAD0CHF

NEED ADVICE ASAP.2008 C300 4 matic Sport 87,000
Noise sounded like a whine, took in thinking might be tires, NO Transmission needs replaced. Called today and informed me my extended warranty run out in Nov. ;-( $7,000 + repair. There was another car in service SAME Issue! I thought I had 100,000 warranty but apparently hit time before miles. I asked for a Good Will . any suggestion?? also is there not a malfunction/warning mes-sages? I have ALL service done at dealership last service Mid Oct. Problem caused by bad part, caused grinding and there was metal in fluid.


Good luck!
2008 C-300 Sport 4matic fully loaded 87,000 and with repair offered me $15,000 trade and without repair $8,000. I will have repaired and explore my options.








