Hi, every time I do my climate, a speed-dependent noise starts after a few seconds. Depending on the speed, it is louder or quieter to hear. It sounds like a bearing has given up its mind. It’s a (multi-voiced?) “blow”. It always stops for a few seconds, and then comes back. It’s best to hear in the driver’s seat. In the engine compartment it’s impossible to hear. If I turn the power of the ventilation almost down / off, the noise is gone. It sounds like a fast-rotating part is losing turns. It’s also to be heard with stationary gas. The climate cools by the way. Did it fill up a few weeks ago. Leak test has not been done. The noise during the ride is really annoying. Driving is not fun anymore…. What can this be? An acquaintance said it’s the magnetic clutch, ….. It’s a V70III from 2008 with about 126000km. Thanks for your help. Greetings Thomas