I want to control the dashboard via CAN BUS.

So how does that work?

As mentioned above you need a CAN BUS Shield for Arduino.

Every Function in the dashboard has their own register address. You can address it with an hexadecimal code.

The problem is that these adresses are not documented by Volkswagen. Some vehicle CAN Codes can be found in some difficult to find forums (like http://www.canhack.de) but you won't find all of them and just for special vehicles.

So how do you figure out these codes?

So we're on hackaday, right? So just let's hack this!

I'll make a brute force attack to the dashboard while documenting the actual CAN address.

More information:

CAN Hack Forum (German): http://www.canhack.de

Volkswagen "Data Exchange on CAN BUS 1": www.volkspage.net/technik/ssp/ssp/SSP_238.pdf