My problem was a broken wire too. This seems to be a quite possible problem: as the stalk moves it rubs the wires against a (seemingly) sharp plastic corner by the joint of the stalk. Atleast with my car (octavia rs 2.0 TSFI -06), I could fix the problem without taking the steering wheel out. The top part of the cover behind the wheel just lifted up by gently twisting with a flat head between the bottom and top halves. Bottom plastic cover was held with 3 torx screws, one beneath, two behind the wheel. The 2 came visible by turning the wheel after the top cover was lifted. After this i could pull gently one by one the wires to see if any of them were broken. I soldered the broken wire and put it back together. Positively suprised that i didnt need to pull the steering wheel off.