It's an 06 octavia and it does have CAN-Bus wiring
--
Alex

"I laugh in the face of danger. Then I hide until it goes away"

www.drzoidberg.co.ukwww.ebayfaq.co.uk

Are you using the ignition feed at the head unit? If you are I would
probably try running a feed from the barrel or lighter socket (if its
12v ign), pick a nice think wire. The ones at the head unit and other
locations are probably linked into the CAN bus stuff. I don't really
understand CAN bus but I know it does some funky stuff when you try
tapping anything onto it, any current draw can cause problems.