20th Nov 07 Hi Andrew, I’ve got a red box I had fitted to my Astra 1.7CDTI, however, I’ve sold it and bought a BMW 118D (a much classier motor!!), but want to improve the economy and power of it? and to be honest I was well impressed by the effect of the Astra (so much more flexible, wheelspin in 3rd and improved MPGs from low 40s to low 50s) Can you confirm I can put the red box on my new car (if I need anything new) what settings it needs to be on, and if it leaves anything BMW can trace when they plug it into their computer (as it?s under warranty still!!) Thanks in advance for your help. Neil Perkins