​ Hey guys, I am fortunate enough to get a 2023 C63S v8. Fully loaded, Every single option ticked. Full-body PPF'd. Here's my question...

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Do I still need to get a Rear Differential Oil Swap @ 2,000 miles? Mercedes is saying no.

Backstory: Previously, a C63S would come with a window sticker saying at 2,000 miles a rear differential oil swap is needed. This is due to the metallic debris caused from breaking-in a brand new rear differential. They were so strict about it, that your rear-diff coverage under your warranty would be voided due to not following the break-in instructions. This 2,000 mile service was included in the price of the vehicle.

Now, present day, Mercedes is telling me it's no longer needed. Could the engineers really have solved this? I highly question that, furthermore manufacturers such as BMW still require it at 2,000 miles for their M series (apparently).

Apparently if I wanted to foot the bill and have it done out of my own pocket it would be $400-600.

Have you guys heard anything about this? Is it still required? Thank you


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no longer required since the FL models rolled out in 2019.

$400-$600 is highway robbery. I believe most ppl have been getting it done for under $200 at the stealership.

 

As said above, no longer needed. The diff in the FL is improved and I believe uses different friction material for the clutch. Whatever they did to improve it no longer requires an early break-in fluid flush. It was debated at the time, and some people still changed it and posted pictures of the dirty fluid. I ended up doing mine as a piece of mind and because back in 2019 the information was inconsistent. AMG Germany told me directly it wasn't needed anymore for my VIN, but for some early 2019 they still said it was needed. It was somewhat inconvenient, because I was doing European Delivery and had to find a shop in Germany that could squeeze me in. I did it a little after 2000 miles near Frankfurt as I couldn't quite time it at 2000 miles. It was only like 150 Euro, though, so if they wanna charge you $400-$600, they are taking you for a ride. BTW, I don't think it was included in the purchase price. It was included in the pre-paid maintenance.

 

My new 2019 C63s coupe had the window sticker stating in addition to the Notes on the Break in period that the rear differential oil must be changes at 1,875 miles. (See photo below). So I had it done I believe just before the 1,875 miles at ther MB dealership for $255.97. At this time (2019)is was questionable if it needed to be done anymore. The SA reminder me to have it changed again at 30,000 miles or 3 years .

According to the MB Service Maintenance Work Sheet: Required Additional Work it states : Replace the rear axle differential oil at 30,000 miles or 3 years. So I had it changed at MB in May 2022 (3 years) at a Cost of $260.59. See photo below).

So if it's not required anymore at the 2,000 miles then when to they recommend it be changed at 30,000 miles or 3 years?

beautiful car.

 

Still every 30k or 3 years like before. Mine was changed at the 3 year service.

 

Congrats on your 2023! However, if that’s your car in the pic, it’s not an FE unless you made some aftermarket changes. Final Editions don’t have the full night package and have black calipers, side and trunk yellow race stripes as well as FE badges on the rear c pillars. It also does not have every single option ticked. The red calipers indicates it has standard brakes instead of ceramic brakes ($5,450 option). Maybe it’s the pic’s lighting, but the rear diffuser and spoiler appear to be gloss black instead of cf. If that’s the case, you’re missing the exterior Carbon Fiber I ($1,750) and Carbon Fiber II ($2,950) options.

It’s still without any doubt a gorgeous car. It looks just like mine which has almost every option ticked, the only 2 worthwhile options that are missing on mine are ceramic brakes and rear passenger airbags. I also got mine fully PPF’d. What color is your interior? Was this your own build or did you find one on a dealer lot? As of now, there are only 6-7 non-FE coupes remaining for sale in the USA.

 

Hey! You're right! I mislabeled it following a similar trend seen elsewhere, it seems there's a trend of 2023 buyers labeling theirs as Final Editions even without the sticker pack as they're 2023, even rarer and include night package. This does not have the $33k "sticker-pack".- my mistake.

I imagine these are some reasons why others have started the trend;

• If the Final Edition had unique traits (a la Edition 1) or performance gains, I imagine nobody would call theirs that, however, intrinsically some would argue due to the immense rarity of the 2023 v8's they're all 'Final Editions', some just without a $33 Thousand sticker option + Removal of Night Package...
• Personally, I like the Night Package. And spending 33 thousand for Stickers felt wrong.
• America also received less 2023 Non-Final Editions than 2023 Final Editions. All in all, I got mine for MSRP with no markup for $106k + Tax. Final Editions started at 134k + Tax.

Why did I buy this one in particular? All 2023 Non-Final Editions are theoretically rarer, and have their Final Edition step-brother's anchoring a high price next to them for life. Sure, the ones with the sticker pack will retain a higher value over time, simply due to a higher sticker price, however the Non-Final Edition 2023's will be right beside that, anchored to the hip, why? Non-Final Editions simply look better stock with Night Package, and are rarer.

She indeed has Carbon Fiber 1 & Carbon Fiber 2 + Carbon Trim & Steering Wheel. The interior is Red Nappa + AMG Performance Seats.

I had been working with Fletcher Jones in Newport Beach for 12 months looking for the perfect spec in the used category as there had been no mention of any future C63S V8 in production. To everyone's surprise, Mercedes shipped these 2023's without even as much as a press release or social media post, completely ghost-shipped them. Was this due to fear with the upcoming plug-in hybrid release? Who knows.

Fletcher Jones in Newport Beach said no customer-builds were available, only pre-specced C63s' on their way from Germany. I called other dealers and they confirmed this. So, to my surprise, I went on a hunt for the nicest optioned one in California (Minus Carbon Ceramics) and found one - Fresno, CA had my pick of the litter. I have been following the market closely and you're right, there are practically none left in USA, especially ones that are well-optioned, and MSRP(or close). The stealerships who still have some available know what they possess and are asking ADM's. This past week, a used 2023 with a few thousand miles on odometer was listed for $120k. Made me smile!

P.S. - The 2023 v8 versions are much, much louder than previous Facelift C63s' (2020, 2021's)

After writing all of this, I do laugh at myself mislabeling it a Final Edition, perhaps it's even better? I shall dub it moving forward, the Ultimate Final Edition!

 

Welcome to the forum and thanks for the clarification. I wasn’t sure based on the pic you posted if it was gloss black or cf but I’m glad to hear you have both carbon packages as they really complete the look. We have the identical spec’d car, except mine has the black w/yellow stitching interior.

The reason our highly spec’d non-FE’s are sometimes referred to as “the Real Final Editions” is mainly because our cars are a better spec than the overpriced FE’s, as such they offer more car for the money. Whether the actual FE’s will be valued more over non-FE’s in the future remains to be seen, and I’ll get more into the possible rarity of our non-FE’s over FE’s more below.

It’s very interesting you mention there were zero customer builds. This was something I’ve long suspected without any concrete proof. I have yet to encounter a single 2023 C63S owner who managed to get his/her own build into production much less shipped. Furthermore, I spent 8-9 months trying to find a dealer with an allocation for my own build. Not one dealer confirmed they had a build slot, or allocated theirs to another customer. I always assumed dealers just used their allocations on their own builds, so it’s news to me that the builds were all pre-spec’d from Mercedes.

As far as the non-FE’s being rarer than FE’s, this is also something that I theorized about here on the forum. I’ve been closely following both the FE and non-FE C63S market online since they started arriving at dealerships a few months ago. From the listing trends, it was clear that non-FE’s were far more limited compared to FE’s. From the data I tracked, the entire 2023 non-FE run appeared to be limited just 40-50 USA models. If FE production numbers were an indicator, it would put non-FE coupes at only a couple hundred models worldwide. The cabs are even more rare. From what I’ve seen, I’d put that number for the USA market at maybe 10-15. With that said, you seem very convinced that the 2023 non-FE coupes are rarer than FE’s. As far as I know, only FE numbers have been made public (499 worldwide, 100 for USA). Official non-FE production numbers haven’t been released by MB and I doubt they ever intend to. Do you have any additional info from Fletcher Jones or other sources which would shed some more light on this topic?

I’ve owned a 2021 C63S coupe, and I agree that my 2023 is much louder.

 

Do it anyway. Mercedes has been wrong about their service intervals pretty much forever now. So much of their intervals are to dissuade people from thinking they're maintenance hogs, or keep people from burning through their service contracts

air filters every 40k, this should be annual, you can actually feel the difference after a 2yr old one
for the now classic cars they used to change the filter every other oil change, aka 20k
10k oil change interval when Mobil1 starts torching itself around 7000 miles and you lose a quart
Lifetime ATF, no dipstick for the old ATF134 cars
5yr/60k ATF currently that goes bad every 30k
rear diff failures
direct injection spark plugs should be changed much sooner than 60k

 

Yes. My early 2019 C63s coupe had the window sticker: the rear differential oil must be changed at 1,875 miles which I had done and again at the 3 year period.
It was ambiguous even in 2019 about this issue whether it needed to be changed.
Now the direction from MB for the 2020 to 2023 is that it no/ longer needs to be changed at 1,875 or 2,000 miles. Thus according to MB Service maintenance schedule the next time and the 1st time the rear differential oil change will be done is at 3 years or 30,000 miles. A big difference from MUST change at 1,875/2,000 miles to now 3 years/30,000 miles.
I was looking to find a MB Service Bulletin, Memo, Document that address this issue and what specifically was done or modified what was done, if anything, to now determine that the differential oil no longer needs to be changed at 1,875 miles or 2, 000 miles? I could not find any such MB bulletins regarding this issue.
Just curious about this issue.

 

As I mentioned earlier, I long suspected this might be a possibility. However I also had unconfirmed data that there were a small handful of allocations which were indeed designated as customer builds. From all the data I tracked, I came across 4-5 dealers who stated their advertised car was a customer ordered car therefore not for sale. One such car is the 2nd remaining coupe on Autotrader by MB of Daytona Beach. The dealer indicated it was a customer build which is off market.

Unfortunately, Fletcher Jones and the other dealers you spoke with did not give you accurate information. We finally have confirmation that there were indeed some customer builds as @ForMBForum just took delivery of his 2023 C63S non-FE coupe that he custom spec’d several months ago. I’m still with you that non-FE’s are rarer than FE’s, but I don’t have any solid proof other than the listing data that I’ve tracked and logged since 2023 C63S’s began hitting the marketplace.

 

Anyone know what differential fluid to use? I have a 2019 c63s and went to the dealership parts department today and they tried to sell me 85w-90, but I told them I'd hold off as I saw a lot of posts saying it's 75w-140? I asked if they had any 75w-140 and parts guy told me they do not sell the oil at that weight.

 

I have a 2019 C63s also and had the differential oil changed last year. I will be home Sunday night and will look for the MB Invoice to see what fluid was used and post a photo of the Invoice.

 

Awesome, thank you. I was sure it was 75w-140 from searching the forums until parts guy told me otherwise! caught me off guard haha.

 

I was one of those, but I started calling dealerships the day the news came out that they were producing the '23. I had to have the performance seats and the night package, also went with the magno paint, so
I have a FE without the stripes, and saved a bunch of $$!

 

Do it yourself it's easy. You'll need 19mm hex socket for drain plug 14mm for the fill, 1.5 L of 75w 140 gear oil, I used 2 bottles of castrol syntrax I thinks about $25 each. When I drained it out at 2000 miles the oil was a very dark green color.

 

The MB part # 001-989-52-03-10 listed on my invoice (photo below) looks like they used 75W-140.

 

Thank you guys! I thought so... I wonder why the parts department guy said it was either 85w90(094-989-09-00-11) or 75w-90... said they don't sell 75w-140. i'm glad I decided not to purchase it.

 

So my dealer got this one, is it ok? They say us the new version of the Syntrax. Thanks