2021 C-Cass AMG
this source says differently. Personally I agree with the above in that it's more likely to be an M276 inline 6 with updated hybrid tech. Otherwise there's less to differentiate the 4 CF cylinder Cla45amg from the C43 AMG .
And the “replacement” for our C43’s will be the yet to be unveiled C53 with Mild Hybrid setup
With the Full C63 with mild Hybrid/ EQ boost
This makes more sense from a marketing and price point, especially since they want to broaden the AMG appeal.
Then again I could be wrong.
And the “replacement” for our C43’s will be the yet to be unveiled C53 with Mild Hybrid setup
With the Full C63 with mild Hybrid/ EQ boost
This makes more sense from a marketing and price point, especially since they want to broaden the AMG appeal.
Then again I could be wrong.
It's a good question whether we will see both the C45 and the C53 variants? My guess would be that we will see just the C45 variant (replacing the current C43's place) but not the C53. Customers would have to move to the E class to get the E53 instead. C63 would most likely have either a hybrid or an electric supercharger variant of the V8 BiTutbo.
At this point it's still a guessing game based on the info we have from these news outlets
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It's a good question whether we will see both the C45 and the C53 variants? My guess would be that we will see just the C45 variant (replacing the current C43's place) but not the C53. Customers would have to move to the E class to get the E53 instead. C63 would most likely have either a hybrid or an electric supercharger variant of the V8 BiTutbo.
At this point it's still a guessing game based on the info we have from these news outlets

edit: You are right, it does draw power from the engine to generate electricity to power an auxiliary compressor that feeds the turbos.
I just can't help but think that with a brand new inline-6 engine, Daimler is virtually killing all support for it as they are now shifting focus into electrification...
Last edited by jonathan358; Sep 25, 2019 at 12:33 AM.
The Best of Mercedes & AMG
C43 (This will NOW be the new Entry level w206 Performance C class model)
C53 (This will replace our car as the middle tier model, now with the I-6 )
C63 w/ EQ (Top of the line hand built AMG)
That’s my guess based upon the direction MB is taking with their nomenclature and product plans (based on other line ups )
my bet would be for a C53 with the M256 and then a 4 cylinder in all models below, just like the new 3-series lineup. Since both Audi and BMW still have 6-cylinders in their sportsmodels, Mercedes will too.
my bet would be for a C53 with the M256 and then a 4 cylinder in all models below, just like the new 3-series lineup. Since both Audi and BMW still have 6-cylinders in their sportsmodels, Mercedes will too.
It does not make sense for AMG to limit this engine just to a very few set of cars.
However, there are not two distinct market buyers....one that wants a higher performance 4 but not a 6 and one that wants a 6 but not a high performance 4.
Its a single buyer that wants more than a base 4 but not an 8.
Hence, if you have both a C43 and a C53 trying to find their micro market buyer....a good chance you will just be cannibalizing sales.
Meaning by having both a C43 and C53 total unit sales will not be much more than if you just had a C53.
Those slightly improved sales would like not cover the overhead cost increase ( marketing, inventory, etc) of supporting 1 model versus 2.
in short, I just don't see a business case.
It does not make sense for AMG to limit this engine just to a very few set of cars.
The M139, does not exist in a longitudinal version, and even if it could do it, it would require more development than the 6-pot.
If it doesn’t come with the 6-pot, I will be going for something else anyway - most likely a CLS 53 (which it might very well be either way)... I’ve had 4-pots with 300+ horsepower and although they are fast, the experience just isn’t the same without the sound.
i think it is unlikely that they will continue to make the hybrid I6 when the petrol M139 2.0 Liter makes just as much power, is smaller and cleaner. The I6 might not make it into the next gen. They will prob hybridize the now 2.0 I4.
The M256 does share many of the modular bits and pieces with the inline-4 and V8 engines from Merc.
The M256 does share many of the modular bits and pieces with the inline-4 and V8 engines from Merc.
I think it could happen. The M276 is already being phased out now despite still being new. If you look at Benz' engine history, most engines do not make it past 1 generation.
The SOHC V6/V8s were all replaced with DOHCs
The 4.7V8 was replaced with the 4.0V8
The 5.5 was also replaced with the 4.0.
And the 3.0 V6 is now already being replaced with the 3.0 I-6.
Also the M139 is probably also cheaper to make than the M256. Its not unimaginable to use a I-4 in a large E or S. In most asian countries, a 250-270hp 4cylinder is the entry model S/7/A8.
The SOHC V6/V8s were all replaced with DOHCs
The 4.7V8 was replaced with the 4.0V8
The 5.5 was also replaced with the 4.0.
And the 3.0 V6 is now already being replaced with the 3.0 I-6.
Also the M139 is probably also cheaper to make than the M256. Its not unimaginable to use a I-4 in a large E or S. In most asian countries, a 250-270hp 4cylinder is the entry model S/7/A8.
The 4.7L V8 (M278) and 5.5L V8 (M157) have a lot in common and have lasted quite long - starting from cars sold back in 2011 (S63, CL63) to cars sold in 2018 (CLS63). Yes, it's one generation but it has been used in a wide variety of vehicles.
My point is that the I6 is brand new and it doesn't make sense to kill an engine that soon. We will see that (or its variant) engine being used for at least next 6 to 7 years, may be with some form of Electric compressor. The I-6 and the I-4 have lot of components that they can share and that reduces their R&D costs.
I attended the AMG Driving Academy event this week in Laguna Seca, and the instructors there spoke about the future of these mild-hybrid based Electric compressor assist engines. They said we are going to see more of these given how successful they have been in Formula 1 and other applications, and how it is beneficial to deliver performance vehicles with the increased fleet emission regulations.
Last edited by Tuxdude; Oct 2, 2019 at 12:51 AM.






