I can check tomorrow but without 3rd row seats, there's just a convenient storage space underneath. I have storage rails and tie down points but I don't really see how the rails would affect shock mounts.

__________________
8/2011 X5 xDrive35d Sport, Black Sapphire Metallic, Black Nevada Leather, Fine Burr Walnut Trim
2/2001 M5, Jet Black, Exclusive Complete Black Walk Nappa Point Heritage Leather, Black Cubic Trim