My C32 + Sprintbooster = loads of fun!
here recommended a SprintBooster and I put my faith in their knowledge and got myself one late last year. Unfortunately, I was sent the wrong part to begin with and after lots of emails back and forth, I was finally sent the correct part last November. However, due to the heavy work load I was unable to get it fitted until today. Boy, is it worth the wait! The car now is a real joy to drive. It takes off with a gentle nudge of the pedal and accelerates from any cruising speed at will. I am so happy with this sprintbooster gadget! I know that there are so many C32 owners on this forum complaining about similar symptons. All I can say is go and get yourself one of these and you will enjoy you investment a whole lot more!
The new sprint booster has a button with Off, AMG, and Non-AMG modes.

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I assume there's a button you activate on this for none/sprint/race modes??
I do know the old model I have made the car feel more peppy even if it was no quicker.......
With the new model, there is an additional lead, which has a switch, that connects to this gadget, as shown in the photo in this thread.
I imagine the race mode is very "sensitive" to the throttle................
By the way, the part number on the box is: SBME0002S.
I'll reply to the other posts later over the weekend, I better go and enjoy the drive on the way home..CAN'T WAIT!!
I've had mine running on red all day, it's soooo much fun that I couldn't careless about the other setting.
The other side benefit that I've noticed is that the annoying jerkiness with the torque converter locking up has almost disappeared. I'm not sure why but it could be because of the responsiveness, the transmission seems to be in the right gear more often and the engine revs higher accordingly. It's bit hard to look carefully at the tacho while zooming in and out of traffic but I've noticed that the rev is generally closer to 2000rpm, whereas pre-booster was more around 1500rpm with normally driving pre-shifting down.
http://www.sprintboosterusa.com/download/catalog.pdf


