Mild Hybrid?

[LucyB]

Hopeless.  Can't get any clear information out of anyone, least of all the guy who thinks he's going to sell me the car (a dealer).  So guess what?  I'm not going to buy it but how true is it that most post 2020 A3 S line hatchbacks are mild hybrids and what does that even mean?  I want a car that will drive 300 miles up a motorway relatively cheaply.  Wouldn't the hybrid (when such a mild one) make that more expensive and the electronics of the car even more compicated and expensive to fix?  Are they all mild hybrids?