Correct!Yes, if they know what they are looking for. The ECU records the number of updates, normally 1, but would be 2 if you had a remap.
Tuning boxes basically just add extra fuel which in turn produces more power! but the drawback is they also create exhaust smoke which if you have a dpf fitted, they really don't like this!Or just fit an iDrive EVC throttle controller - you will not be disappointed. I've driven an NP300 with a so called tuning box and the difference was barely noticeable - the manufactures claims I simply didn't believe. The throttle controller does not increase power at all btw.