1. The diagnostic port is in the motorroom.
2. Turn ignition on.
3.Connect the Tacho Universal to the BMW diagnostic plug and the diagnostic port.
4.Select the menu
   BMW-5er/7er-E39 low- Diagnosis   (up to software 14)
or BMW-5er/7er-E39 low- Diagnosis SW 15 (for software 15)
or BMW-5er/7er-E39 low- Diagnosis SW 16 (for software 16)
5. The Tacho Pro 2008 Universal does not show you the old value.
6. Enter the new value.
7.Verify the new value with OK.
If the value does not change, try again with the connector "old".