You can download the general manual here in Dutch or French.
For some parts of the bike we refer to the manufacturer's manual:
Spaninga head light en rear light
Gates Belt drive
Shimano hydraulische brakes
How does the display work?
The MONTREAL and the BOSTON both use the same display. A manual for this display is found here in Dutch and in English. For the BROOKLYN, the display is integrated in the handlebar. For the mentioned display, a manual is found here as well in both Dutch and English.