Squeaking brakes – TÜV?

Servus! At the beginning I have to admit that I’m pretty much the last person to know cars. But I’m totally unsure and would be happy if you could tell me your opinions on the following issue: I’m driving a Mercedes A-Class. About 2-3 months ago the brake pads were exchanged, because this small screen told me that brake wear is taking place. The new brake pads are not original Mercedes brakes, but rather rather a bit cheap (as I understand it). e) and was installed by a buddy. After that the display was gone and everything was good. Unfortunately it started to squeak while braking, otherwise however no faults. According to buddy no big problem. Then I had to go to the TÜV and was afraid that the something was faulted and I had to pay a lot. Everything examined, nothing at the brakes determined, but 1-2 other defects. I then fixed that, however, has passed too much time (private unfortunately some things happened) and now I’m a little late for the re-show (is that so?). I know, now everything can be checked again and it gets unnecessarily expensive again, my bad luck. The brakes squeak now a little more than last time. My question now: If they squeaked last time, but the function was apparently spotless, then I can get through this time with squeaks? Or do you think that it was “only lucky”? I was told that squeaking is no problem at the TÜV and if I vo This time it will probably work out for a month. Nevertheless, I’m kind of scared and it’s a bit embarrassing to entertain the hall through a loud squeaking. 🙂 Maybe someone wants to add his mustard to it…