For those who want to expand its Navigon with Truck Software (from MN 7.5.4 versions).
With MN 8 No Truck extension works.
1.This key must be inserted into the device.xml file.
<C3P12> 9PYJ19-42BW3V-P7VE5N </ C3P12>

2.Truckattributes_EU.nfs file must be copied in to map folder(the file must match cards quarter)

3.Copy the contents purely out of the truck folder in the folder of POI:[Only registered and activated users can see links. ]

4.Soft reset & enjoy

5.For those who want to undo,1.delete the key from device.xml,delete Truckattributes_EU.nfs,delete truck pois,soft reset