It is possible to install the on board computer but it is limited in comparison real OBCs.
MPG
Miles to empty
outside temp
Average speed
I know I've seen installation instructions somewhere for the BC. I can't find them at the moment.
Fog lights are a PITA to install.
http://happytogether.com/318ti/notebook/foglights/ The price is pretty low.
Also keep in mind this does not have the sport suspension