Buying a diesel car – thermal window problem?

As a long-time petrol driver, the diesel scandal almost completely passed me by. Now I'd like to buy a diesel, a Skoda Superb with the "scandal engine." An update has been installed for the affected cars. Now I've recently read about this "thermal window" problem, where no legally binding decision has been made yet. Can…

Is a normal software update of the engine control unit mandatory?

The following: The repair shop says there's an update for my engine control unit. Without a letter, without a callback, they'll install it alongside the actual repair. Am I obligated to do it? The receptionist at the dealership said "absolutely," which I can't imagine. It makes sense for the warranty, but otherwise, it would be…