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Old Nov 16, 2023 | 10:14 AM
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Matthew Cohen's Avatar
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C450 AMG
Trans underfilled

Just did a transmission service on the 7g and after thinking about it more, I believe I slightly underfilled the trans. Probably by around 150ml. 2016 c63s. Is it urgent I get back under and fill a little more now? Or can I wait until spring when it gets a little warmer and do a refresh at the same time? (Without dropping the pan).

Last edited by Matthew Cohen; Nov 16, 2023 at 07:27 PM.
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Old Nov 17, 2023 | 03:16 AM
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16' C63s, 22' RAM 1500
Fill it.
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Old Nov 17, 2023 | 04:36 AM
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⏱️ 700HP Facelift converted C63 S Coupe with Drexler 3.06 plated LSD
Originally Posted by Matthew Cohen
I believe I slightly underfilled the trans. Probably by around 150ml. 2016 c63s.
Hey mate fill it up properly and you'll be good.
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Old Nov 17, 2023 | 07:05 AM
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C450 AMG
Damn haha I was hoping I'd be able to leave it
Anyway I'd rather be safe so I'll have to get back under there on a semi-warm day. Thanks a lot for the input guys.
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Old Nov 20, 2023 | 12:47 AM
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Originally Posted by Matthew Cohen
Damn haha I was hoping I'd be able to leave it
Anyway I'd rather be safe so I'll have to get back under there on a semi-warm day. Thanks a lot for the input guys.
No prob I know how it is haha did you top it up yet mate? All good?
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Old Nov 20, 2023 | 01:18 PM
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C450 AMG
Originally Posted by Jimmy_c63s
No prob I know how it is haha did you top it up yet mate? All good?

Not yet since I don't use the car a ton, I've only done about 30 miles since I did the service. Also need a new crush washer which I have to order. This project has been shelved until after Thanksgiving lol. Next Wednesday is the first day I'll be able to get to it. I'll update with how the car runs after topping off. Right now it feels fine, a little bit clunky from time to time, but thats the 7G trans.
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Old Dec 14, 2023 | 08:21 AM
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C450 AMG
Finally filled er up. Took a little extra fluid, car feels about the same tbh but now I have the peace of mind.
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