Sprint Booster, yes/no?
I have just found out about this. I did a search and many seem to give this a thumbs up. However it does not seem to be a must have. There is a thread here right now about the best way to accelerate and though it is not about mods this Booster is not mentioned as something the car should have. Is it proven to reduce et's, truly, by the guys here who have it?
By the way, thanks to the Crossfire guys as I have an SLK32 and there is little on performance on the SLKworld forum!