Solved!
Thanks to Buster's topic.
Have any one had problems with connecting/programming of the steering wheel controls?
My loom has three wires (white, red and black) which I've connect accordingly to the Key1, Key2 and the black wire.
Every programmed button (ie. volume up) acts as if it was programmed to change the track/station to the next...
The learning application in the HU shows that all, apart of the phone pick up, buttons were programmed correctly. And in the end they do the same action.