Moin, I unfortunately have a serious problem with my V50 2.4 BJ 2005. The CCM air conditioning unit has completely discontinued the service. So there is no ventilation anymore, no air conditioning, no radio, no seat heating. At first the part fell out in between times and then went out again. Since my battery was quite old, I changed it directly. After that, unfortunately, nothing went on at all, since then the part is completely dead. I still had a CCM of a newer year of construction lying here. Now I wonder if it is not due to the CCM or another defect. Is it normal that an unregistered part does not show a function at all because it has to be registered in the system first? Does anyone have experience? I have already checked and cleaned the fuses and the CEM. My consideration was to send the CCM to the company Rickim Elektronik in Düren to have it checked and repaired if necessary. he company experiences? I am happy about every tip! Bastian