Recently purchased a 2011 x5d CPO. Drove in the rain for the first time and the rain sensor appears to not be working. I get the first wipe when engaging the auto mode but nothing more. Has OEM BMW glass. When I inspected the sensor looking through the windshield there appears to be bubbles around the eye. Have found many pictures of the square sensor but none of the later round ones. Can someone post a picture of the round sensor through the windshield from a working system? Secondly, any chance this would be covered under the CPO?

Thanks
Dan