Hi! And sorry my bad english. I've got 11' Superb Combi with electric tailgate. The open button on center console doesn't work. The boot will open with a keyfob or from trunk button. Checked failures with Vcds, nothing was found. Is the button broken or is it somewhere else?

I'd check the fuses first, just in case, then pop the centre console out and check the switch with a multimeter. 

Checked fuses, all of them was fine. How can I check if the button is broken?

I've not tried it on the Superb, but it's gong to be a momentary switch. You'll have to remove the centre console trim (have a search on here for instructions). To test the switch I would guess its a case of putting a multimeter on the two pins and checking resistance when the button is pressed.