Sport mode/Sport ESP vs Manual mode/ESP Off
I'm not a particularly skilled driver so it doesn't matter much personally, but this is the kind of stuff that keeps me up at night.



Generally I think you can crank up the slip as conditions improve. If it's cold, don't risk it... as it warms up you can play more. I don't worry too much about what is fastest unless you're hitting the track, a lot of the joy of the C63 is just the tail happy V8 nature, just you and throttle steering an absolutely insane-sounding engine. I just don't want to crash, others are more risky.
C (Comfort) is the smoothest, lower shift points, and starts from 2nd gear on standstill.
S (Sport) starts from 1st gear, higher shift point and will be less 'eager' to shift to higher gears taking into account vehicle speed and engine speed (RPM).
Manual on our cars gives you manual control, but the shifts are not faster than S. Mainly because in Manual, you need to know the lag in order to time your shifts properly (both up and down). If you upshift with the paddle too late, you will not have a smooth shift, as there is a noticeable lag between pressing the steering pedal and the actual upshift or downshift - therefore you need to know the car and shift earlier than you would on modern cars where manual mode shifts almost instantaneously. On downshifts it's even worst, expect a full second+ before pressing the downshift pedal and the transmission shifting down a gear (in our W204 C63 it rev-matches which is nice especially for those years).
The traction has three settings, ON, ESP Sport, and ESP OFF. When you quick-press the traction control button, it is partially off, and will give you little wheel slip or angle of slide. If you press for 3 seconds, it's fully off and you're on your own.
I have 275s on the rears of my C63, it fits with no spacers (on aftermarket rims 19" instead of 18", similar offset, but I believe 0.5" wider rims than stock). It was important for me that the tires do not stick outside the body or rub, and they are flush and do not rub.


