hello people I have a question again…does it know exactly how exact or inaccurate the tacho information at a speed so between 110 and 150 km/h at w 140 are!! ???!! can you speak of a general deviation in height of XX % or is that from tacho to tacho different…can it be that you drive faster than the tacho indicates ?? I was flashed for the second time in 3 weeks and now it is kbapp…hope only for tolerance and “frozen” tacho”…love greetings chris