After reading this thread about cracked wheels I did a visual inspection of the outside of the wheels and found nothing. I was having vibration issue at about 50-60 MPH and brought the car in for 15K service and that vibration issue. Asked them to check for cracks. Turned out they replaced 3 bent wheels. I do have the tire/wheel insurance plan so there was no charge. I was shocked by their findings. The car rides quite smoothly now. Be aware of this possibility with your wheels. My combination is 19” RF tires and wheels.
2011 550iX GT, 2011 MB C300 sport, 2003 Porsche C2 Cab (turbo conversion)