ddcha

Sounds and feels like a completely different car! I thought it was simply a throttle response calibration, but the transmission is completely different, holding high revs longer, making me smile more.... just sayin', pleasant surprise for me.

rory breaker

M is even better, quicker shifts, go for it

m a x i m u s

And it blips in S mode, which was another pleasant surprise.

JeffDL

yeah it uses 1st gear. never understood why c mode exists.

noodleman

^^^ being able to start from second gear is great when you're driving in the winter time for those of us that get snow

GrnLantern

It's supposed to improve fuel economy (C == Comfort Efficiency), it's also the mode these cars were emissions certified in, which is why it has to always default to C when you start your car.

LuisC55AMG

Interesting, I always tested previous C63 in M mode. Same happened when I check mine for the first time (I wanted to compare the trannies since I owned a C55 before). I only switched to S mode after the first month.

danlnyc

am I the only one who likes to test out EVERYTHING on a car after I purchase it? I would've popped that baby into S mode the same day lol

khmergod

All modes first day

SaphGreyC63

All modes first day, but I wasn't prepared for how much S+ mode likes to downshift and hold long it held revs so it scared me a bit since I was trying (but failed, lol) to break it in per MB instructions.

khmergod

Not sure if everyone's is the same, but hard braking from 4th to 3rd=loud burping. Everyone should try it.

morganb

Mine does not default to C when I start the car.

SaphGreyC63

WHAT?!?! Please tell us how!!!

Sidv22

Every other day, I also discover what a huge difference the s mode makes to the fuel economy :-) So i use C for commuting to work and S/M on weekends.

Mort

What year is your car? I think it started to default to C mode on start up in the 2010 MY.

Fung63

i popped my car in every mode when i was test driving it... only real way to see how it screams

VaclavSV

I am always in S+/M ... F fuel economy!

morganb

MY 2008, guess that is why.

csexty3

Love the bark the exhaust makes in S+ mode upshifts. I probably did a 1st to 3rd gear pull more than 30 times (jk I respected the car too much to do it more than 3 times in a row)

On every freeway on-ramp I downshifted to 2nd and blasted through top of 3rd/middle of 4th.

Damn this car is so much fun it's stupid.

CoolBDPhenom03

LOL. It is though.

drawde

Mine defaults to S as well when I start it up. MY2009. I don't think there's a way to start it in M.

I just recently rode around in C mode for a few weeks just for kicks.. I saw NO difference in fuel economy.. HAVE FUN WITH IT !! S+/M

C-63AMG

Mine never defaults to C. It always stays in the mode that I switched it off in (Always Sports). The problem is that S is not good for cold start ups. It's too rough on cold start ups so I always switch it to C mode until engine temp stabilises and then it's S all the way.

ddcha

I don't understand why C/S/M would make a difference at startup.

C-63AMG

For me it's rougher and more jerky in Sports on cold start so I always switch back to custom which seems to have less powerful / smoother gear changes.

CoolBDPhenom03

This is true for me as well MY'09. Accelerator inputs are a little more sensitive than "C" until temps are up. Could be the 1st gear vs 2nd gear difference.