Side/rear Glass problems of the 2002 Mercedes Benz S Class

My driver and passenger side window is developing spots. I found the many owner of this w220 s-class Mercedes Benz have similar problems. Dealer (caliber motors) inspected and informed me that the window started to DE-laminate. Since my basic warranty ran out at 50,000 miles I have to put up the bill for the repair. My car is currently at 61k miles. Only 4 year old. The front 2 window delaminating is not my fault but a defective part. Windows are not a wear item therefore it should not fail or in need of replacement before the life of the car except in the case of an impact. Cost of replacement is substantial. . Cost can exceed $700 per window for parts and labor. I feel this is a defective part that may become a visibility safety issue if manufacturer refuse to take responsibility to replace. Car owner may most likely not change the window due to cost issues.