Even in the new Octavia A4 and Tours, the creak of the door locks appeared almost immediately after the purchase. More often than not, the noise appears on the driver's door, because it's the most used. It is believed that the central pillars of the body are central, but this version has not been proven.
The only way to fight creak is to regularly lubricating the castle and its hinges. After the lubricant, the door needs to be opened and closed several times. The screwdriver will reappear after a while, and the door will need to be re-lubricating.