Moin, unfortunately, a noise bothers me which I can not really locate. Need extended help from you. The howling occurs at cold start, rather between 40 and 60 km/h. I thought to first it occurs directly before the switching process, but after manual switching through the gears I found that the howling is dependent on speed. It also doesn’t cry permanently, but sporadically, also not directly when load changes. If the window is opened, I don’t hear it, only in the inside. As soon as there is temperature in the car, everything is quiet after a short drive, as it has to be. – No problems with the switching operations. – Turning the engine in service is easy. – Gear oil has been changed fresh. – In the summer the middle bearing of the cardan shaft was replaced. I eagerly await your tips and opinions. SLK, R170, 136hp, automatic, 165 tsd. km, year 1998 a short video, unfortunately very short, shot on our company premises because of Han dy at the wheel etc.: howling SLK