So I recorded with brown contact - and lo and behold - just an hour later, I was told quite straightforward that I get refunded the purchase price despite expired warranty. The problem with the rotor blades should no longer occur according to Internet data in the more recent batches. To me, that takes some getting traceable and therefore I have no concerns, again to buy a hair dryer from Braun.
*** So overall a really good service from Brown. ***