They're probably looking to give your build slot to another buyer at a premium and using the addition of sports seats as an excuse to switch slots.
Total rubbish that this change would have such a huge effect. I made multiple changes to my order up until about 2 weeks before mine entered production and they had no effect on the production date and therefore no effect on the delivery date.
__________________
F25 xDrive20d SE __ professional multimedia package | dynamic package | climate package | 309s | xline | xenons | electric seats | folding mirrors | business speakers
|