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9G transmission service kit question

Old Mar 16, 2024 | 06:52 AM
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9G transmission service kit question

I was shopping for all the parts needed to do the oil change on the facelift 9-speed transmissions on the c63s and had some questions. The kit that Fcpeuro sells(link 1) is supposedly the full kit and costs $476. However, if I buy all the parts separately and grab two of the 5L version of the oil(link 2) it costs $352. The second option shouldn't be an issue but I just wanted to make sure in case something is different. Lastly, there is also an alternative liquid moly fluid(link 3) that is substantially cheaper and also meets the Mercedes rating. Has anyone run this fluid? I don't mind paying for the Mercedes OEM but if the liqui moly is actually better and others have used it I would purchase that. Thanks!








Link 1: https://www.fcpeuro.com/products/mer...14#description

Link 2: https://www.fcpeuro.com/products/mer...13#description

Link 3: https://www.fcpeuro.com/products/top...34#description
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Old Mar 17, 2024 | 12:32 PM
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The 5 liter jugs for some reason are cheaper to get than the 10 individual quarts of fluid. When I did my service I did something similar and bought all the parts separate from their kit and saved about $90. I bought 8 individual bottles of fluid and that was sufficient with 1 bottle left over. Go with the second option, Save the $100.
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Old Mar 17, 2024 | 03:15 PM
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Originally Posted by mokawop
I was shopping for all the parts needed to do the oil change on the facelift 9-speed transmissions on the c63s and had some questions. The kit that Fcpeuro sells(link 1) is supposedly the full kit and costs $476. However, if I buy all the parts separately and grab two of the 5L version of the oil(link 2) it costs $352. The second option shouldn't be an issue but I just wanted to make sure in case something is different. Lastly, there is also an alternative liquid moly fluid(link 3) that is substantially cheaper and also meets the Mercedes rating. Has anyone run this fluid? I don't mind paying for the Mercedes OEM but if the liqui moly is actully better and others have used it I would purchase that. Thanks!








Link 1: https://www.fcpeuro.com/products/mer...14#description

Link 2: https://www.fcpeuro.com/products/mer...13#description

Link 3: https://www.fcpeuro.com/products/top...34#description
Just wondering how many miles you have on your facelift? I have a 2019 C63s with 30,000 miles and am scheduled for the 5 year/50,000 miles Service next month. This Service includes the spark plug change. But according to the MB Service maintenance sheet the first required complete transmission service is done at 6 years/ 60 000 miles. (Expensive).
Seems like it should be required earlier?
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Old Mar 17, 2024 | 07:37 PM
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Originally Posted by jj18
Just wondering how many miles you have on your facelift? I have a 2019 C63s with 30,000 miles and am scheduled for the 5 year/50,000 miles Service next month. This Service includes the spark plug change. But according to the MB Service maintenance sheet the first required complete transmission service is done at 6 years/ 60 000 miles. (Expensive).
Seems like it should be required earlier?
I have 29,500 on my FL currently and I changed the fluid at 20,000 miles. I was experiencing severe low speed shudder and jerking. So my goal was to change the fluid and filter filled from factory. Also reset adaptations to try and alleviate the problem and it helped tremendously. Generally speaking transmission fluid and filter should be changed around 3 years or 30k on any car. I know transmission builders that always preach this interval.
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Old Mar 18, 2024 | 05:11 AM
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I appreciate the response, this is what I decided to do. Ordered all the parts but I was told by a few people only 6 Quarts are necessary. I bought 7 to be safe but we shall see how it goes.
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Old Mar 18, 2024 | 05:21 AM
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Originally Posted by Shlick96
The 5 liter jugs for some reason are cheaper to get than the 10 individual quarts of fluid. When I did my service I did something similar and bought all the parts separate from their kit and saved about $90. I bought 8 individual bottles of fluid and that was sufficient with 1 bottle left over. Go with the second option, Save the $100.
I appreciate the response, this is what I decided to do. Ordered all the parts but I was told by a few people only 6 Quarts are necessary. I bought 7 to be safe but we shall see how it goes.
Reply
Old Mar 18, 2024 | 05:24 AM
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Originally Posted by jj18
Just wondering how many miles you have on your facelift? I have a 2019 C63s with 30,000 miles and am scheduled for the 5 year/50,000 miles Service next month. This Service includes the spark plug change. But according to the MB Service maintenance sheet the first required complete transmission service is done at 6 years/ 60 000 miles. (Expensive).
Seems like it should be required earlier?

I have 25k miles at the moment but I am doing it early as I do all my services pretty early. I believe 63 AMG cars are at 30k miles and the other 9g cars are at 60k miles. A friend of mine who is a tech at Mercedes has also told me the interval is at 30k so might as well do it early.

Last edited by mokawop; Mar 18, 2024 at 05:28 AM. Reason: added information
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