@manuelf, agree with most of your post about the limited advantages of a hybrid system, but the part bolded below is not so clear cut -
If you go on track (every marketing campaign of AMG and ///M talks about track use!) with an C63e, then after three laps you are in ICE only mode, falling back to 4xx hp 4 cyl only and still having a 2 ton vehicle!
Around a track, a hybrid can - 1. Recuperate part of the barking energy to recharge the battery. 2. Use the ICE to charge the battery when the ICE is not using 100% of its power to propel the car. Of course, #1 is more desirable than #2.
I don't know how much #1 exactly is - the only concerte figure I have is 2018 F1 car recuperates around 2 MJ (0.55 Kwh) per lap around Monaco. Not sure how that translates to a roadcar like C63 around a track - since there are many variables -
1. Weight - Since road car like C63 probably weighs ~3x more that F1, theoretically should be able to recuperate 3x more energy, everything else being equal.
2. Speed delta between beginning and end of the braking zone - Since F1 has higher proportionally far higher cornering speeds compared to road cars than straight line speeds, I would guess the speed delta is higher for a road car.
3. Amount of braking you can assign to regeneration vs mechanical braking - again, I am guessing since braking forces are much lower for road cars, you can assign a higher amount to regeneration compared to F1.
4. On the flip side, I doubt whatever system a road car will use will be as efficient as F1.
But given all that, I would not be surprised if a hybrid C63 could recuperate a good portion of 6 kwh over a few laps.
Now - a 6kwh battery powering a motor outputting 70kw continuously should last ~300 secs - at a track, good for probably 4 laps around a typical track. So maybe it should be sustain +70kw of hybrid power indefinitely.
Of course, from a pure performance pov, there are far easier/cheaper/lighter ways to gain that 70 kw than a hybrid system, so the larger point you are making stands.
