Hello all, I have a N47 engine, Xdrive, 175,000 km on the clock. After the holidays I set myself the drive shaft and the bearing bulge to button me in front. Has someone ever done that or a short instruction to do so? The bearing bulge is oily with me and after about 4 weeks the oil drips on the ground, about 5 cm stain. There the camp and O ring should be new. The car makes roaring noises up to 4 gears which go away when you step the clutch. Up to 60 km/h are also wind noises to hear, from 60 km/h they are gone, also the dröhn noises. Otherwise the car drives unobtrusively. The distribution gearbox has received new oil, unfortunately without improvement. When changing wheels from 18 inches to 17 inches is the drowning a little less. Bin Ratlos and hope that the drowning comes from the bearing bulge and drive bulge. Greetings