Does any one know how to display the same instantaneous data / information
in the E90 instrument cluster that you can in the E46 and E39 cars, such as
system voltage, true coolant temperature, true r.p.m.?
I can get tests 1.x (chassis number, build date, software version et cetera)
and 2 (cluster LED and meter checks) to work, but I cannot unlock test 19.
Some dealers say in cannot be done, others say they do not remember how to