I have a full warranty through to July of 2013 or 62,000 miles, whichever comes first (most likely 2013) and am not mechanical whatsoever. I don't believe that the Needswings CAI voids the warranty, but I am asking about it just to confirm. The SLK55 variant may not void it either. Most ECU tunes shouldn't be detectable, so that's probably safe. All of the other stuff I want to do is cosmetic. I really don't need this car to be much faster