I would like to have non-leather seats, but when trying to configure with the driving assistance pack then the configurator automatically ads the leather seats. Could this be a mistake in the configurator?
Without checking it could be that the leather seats are tied into the memory pack for seats, and therefore the driver assistance pack needs leather.
The all the indivisible items in packs can spec'ed separateatly, so make a note of all the extras there, and select one by one, checking the seat type after each one.
This should help you determine what is switching it back to leather.
S, EV 400, Narvik Black, 18" wheels, Panorama glass, Normal LED's, Sport Seats in Luxtec heated in the front, Charcoal Ash, Heated steering wheel, 380 W sound, HUD and then if I want to choose under options a driving assistance package it ads automatically the leather seats!