2019 C63s no longer needs post-break-in rear diff oil change?
Last edited by BrianShaw23; Jun 29, 2020 at 03:55 PM.




I do all of my own maintenance so I decided to do it anyways, despite what I have read in this post.
The oil that came out was actually really clean and had a minimal amount of clutch material in it. I am glad that I did it just for peace of mind.
The oil that came out of my W204 2014 C63 AMG Coupe at about 2,700 miles was really dirty and had a lot of clutch material in it.
I wouldn't really worry about changing it if you haven't already done so, especially if you have to pay someone to do it.
But thanks for the post! Glad to hear that it was clean. I'm still on the fence if I should do it or not... still sitting at ~500 miles...
The Best of Mercedes & AMG




But thanks for the post! Glad to hear that it was clean. I'm still on the fence if I should do it or not... still sitting at ~500 miles...




You have 3 choices:
1. Rag it out and then sell it (and screw over the next owner)
2. Maintain it per specs and enjoy it
3. Don't buy one in the first place (we've seen this happen all too often...)
You have 3 choices:
1. Rag it out and then sell it (and screw over the next owner)
2. Maintain it per specs and enjoy it
3. Don't buy one in the first place (we've seen this happen all too often...)
This being said, just asking to tone down the hostilities. Maybe it's the internet, but reading your comments once again felt like an attack on my capability of maintaining my car. Yes I will clap back at that.




This being said, just asking to tone down the hostilities. Maybe it's the internet, but reading your comments once again felt like an attack on my capability of maintaining my car. Yes I will clap back at that.
Now back to your conundrum, the e-diff still uses differential fluid. It still uses gears made of metal. Get the flush. Get a receipt. Keep the receipt for any future questioning should the worst happen.




Last edited by superswiss; Aug 13, 2020 at 10:43 PM.




The service sheet for my 2020 C63S AMG Coupe does not show that it is required at 2,000 miles like my previous W204 2014 C63 AMG Coupe was.
The main difference, I would assume, is the Electronic Differential.
They do not use a break in fluid even if it is due at 2,000 miles.
Last edited by JRHolt; Aug 13, 2020 at 11:00 PM.




After 2,100 miles on my 2020 C63S AMG Coupe it was really clean and almost looked new. There was a small amount of friction material suspended in the fluid that would drop to the bottom but it was a very minimal amount.In your post #23 above, you mentioned that the fluid was stinky. It always smells like that even when new.
After 2,100 miles on my 2020 C63S AMG Coupe it was really clean and almost looked new. There was a small amount of friction material suspended in the fluid that would drop to the bottom but it was a very minimal amount.In your post #23 above, you mentioned that the fluid was stinky. It always smells like that even when new.




I am also on the fence about having it done at a dealership or at some of the highly recommended shops mentioned in the forum (BenzWorks, Star Motor Werks, etc). Any recommendations and suggestions are greatly appreciated, thank you!
I am also on the fence about having it done at a dealership or at some of the highly recommended shops mentioned in the forum (BenzWorks, Star Motor Werks, etc). Any recommendations and suggestions are greatly appreciated, thank you!
Otherwise, I highly recommend Star Motor Werks at Costa Mesa, CA.
I actually took my 2020 C63s Coupe yesterday to there to get downpipe installed and they did exceptional job.
Their price is also very good. I am sure rear differential service will be cheaper than one from dealer.
I am also on the fence about having it done at a dealership or at some of the highly recommended shops mentioned in the forum (BenzWorks, Star Motor Werks, etc). Any recommendations and suggestions are greatly appreciated, thank you!
But, I got the prepaid maintenance so I made sure they did it.
Did it at Beverly Hills. The SA even looked in the system to see if I needed it and either he was just confused and went along with what I asked him or the system still says to do it.
Edit: I got my car May of 2019 and ended up getting this done shortly after of course, so maybe there was still some confusion about the FL at the time. Although, I would expect Beverly Hills to know.
Last edited by Encore818; Oct 6, 2020 at 08:40 PM.
But, I got the prepaid maintenance so I made sure they did it.
Did it at Beverly Hills. The SA even looked in the system to see if I needed it and either he was just confused and went along with what I asked him or the system still says to do it.
Edit: I got my car May of 2019 and ended up getting this done shortly after of course, so maybe there was still some confusion about the FL at the time. Although, I would expect Beverly Hills to know.
I think by MY2020 all limited-slip diffs used the new material. If it were mine, I'd sleep well at night without a fluid change as long as my windshield didn't have the sticker.




