In the last 2 Years all 4 CV Boots have Split and threw grease. First the right outer two years ago and then 1 yr later the left outer and now both inner boots have blown at the same time. I only have 62,000 miles on vehicle and the van does not get abused. Why do you think this is happening? Also, My climate control in my GLE works for about an hour and after an hour it blows cold air at all temps except 90 degrees, and then it blows real hot air at 90 degrees. I took to dealership and they said it was the thermostat was getting stuck and that they fixed it but next day same problem. Anyone here with similar problems or can help with advice please post reply. Thanks.