Greetings, I have to contact you again with a problem. I have recently been the owner of a SLK 230 compressor in the Mopf version, mileage about 160K. I’ve noticed a strange noise in the engine compartment since the takeover. It sounds like it comes from the left of the engine compartment from the front. More precisely viewed from the left of the engine below, or from the compressor. From exactly 3000 revolutions it becomes clearly audible again. But until then not increasingly, but only from 3000 . Out of interest, I have upgraded the compressor today to take a closer look at it. It can be rotated perfectly, not a game. What surprised me a little, it is absolutely clean. No oil, nothing, as if someone had overtaken it. (See picture.) I had a comparatively old one of my previous still lying with me, this one was smeared with oil inside everywhere. My questions, should that be so, someone has heard this sound already? What I did: Compressor removed and d by hand gone crazy, no game. Camshaft adjuster plugged off and sometimes run, noise remains. Once heard with a broomstick, could also come from under the valve. (Control chain?) I upload two audios, tomorrow I do better again. LG