This learn thing is something I have heard about too. It is also sometimes refferred to as fuzzy logic. I want to know if the ECU learns from you'r particular style of driving, and if so if it is worth resetting it when you have just bought a second hand car and want it to learn your own driving habbits.
I have also been told by one dealership that the learn mode is reset and all the values lost when the ignition is switched off i.e. it is only learning for the duration of each journey. What do you think?