Good evening together! I would like to change the air compressor, the dryer, the capacitor and the pressure valve on my S60 D5 from 2004 with approx. 320tkm. The parts are ordered and the installation I would like to take over. But now the question, because in many instructions (also in the one from the compressor manufacturer Mahle) is that both the expansion valve has to be replaced and the entire system has to be flushed?! I would have the system evacuated, the parts replaced and then re-used. Is the flushing and the exchange of the expansion valve necessary? Pollution from the outside should not be in the system, as the air conditioning system works and cools normally. However, the compressor makes light noises and the magnetic coupling does not always separate correctly. Thus, there is a slight imbalance in the belt drive. How do you estimate the situation, is the flushing necessary? A clean working environment is of course basic prerequisite! A nice evening, many greetings and thanks in advance!