XE 2.0D Main Investigation DO NOT UNDERSTAND!!

Hello, my frustration has to get rid of here… Had ordered my XE brand new and drive it for 3 years now. This is the time when you have to drive for the first time to the main examination in Austria. I drove to the ÖAMTC (our equivalent to the ADAC) with a good mood and without a bad foreboding. When I picked up the car, I already saw the appalled face of the mechanic, who was almost embarrassed to tell me that the car would NOT be allowed to operate more when the necessary repa In addition, the left rear brake disc and pads were completely at the end! Not only the few km (51Tkm) and the delicate age of 3 years caused the anger to swell up in more, but all other brake discs and dampers are as new as possible! In other words, material errors must be the culprit How can a 60k€ car please after 3 years already not be carried out… I have already written to the JLR dealer with the expectation of a warranty cover or bulwark control, even if it is wear parts, how can it be that the errors occur only on the left back?! I’m curious what feedback I will receive. I’m not willing to pay 1€ for this cheekiness on a so-called “premium” car.