My car (still just in manufacture warranty) went in for a brake fluid service last week. I got one of those nice videos saying they needed to replace the front callipers as the outer bleed screws on both sides were seized. £1,500 please. I told them to contact Audi UK warranty, not sure why I had to do it but there you go. Warranty eventually approved sorting them out. Today they have magically been un-seized. What would you do next?