500c, brake discs down after 50tkm?

The Luigi of my wife is just for a 4-year inspection in the workshop. That the brake pads have to be new in the back was clear to me. But now the workshop says that the windows in the back also have to be new!? And the whole fun (inspection plus brakes in the back complete) should cost about 1,000€ (without TÜV mind). Of all other vehicles I know this actually so that one can drive with a set of disks 2 sets of pads. And that the discs hold 100-120tkm, at the back rather longer. I’ve asked you to keep the windows and present them to me tomorrow. I’m curious to see how they come to 1,000€. The windows and coverings are very cheap for the 500’er (<100€), even branded goods (Brembo et al.). Greetings Tom