Speed Signal: Definition and Explanation

Sure, here is the translation of the text from German to English:

'Hi again,'

'I think I've found the speed signal in my Mercedes-Benz Viano (on the comfort CAN bus).'
The conversion to kilometers per hour seems a little odd.
(2-byte value / 16) - 1, applies when speed is below 30 km/h.
(2-byte value / 16) - 3, applies above 30 km/h.

'While this appears to be accurate from 10 up to 140 km/h, I find it a bit odd that it needs to be calculated in this manner.'

'Kann jemand hier Licht ins Dunkel bringen oder etwas bestätigen/korrigieren?'

Sure, here's the translation:

'Thank you in advance and best regards,'
Marc.