This is an issue that is frequently discussed on Briskoda, with many Octavia owners having the same
problem. It can quite often be nothing more than dirty contacts in the switch. And after all, it's basically the same car, with exactly the same components fitted.
There is a procedure to take the switch apart and clean the contacts, I did the translation myself from the original Danish version. Check out post 14 of this link
http://briskoda.net/forums/topic/12...-i-change-it-myself/page__hl__cruise cleaning
Dead easy to do, took me less than half an hour from start to finish.
Hope this helps
Mike