As long as you are checking things also check the rubber around each door and door closure to make sure the hinges are not sagging, the rear air vents inside each side of the trunk area - if the rubber is deteriorated, they need to be replaced or exhaust fumes can get into the car under some driving conditions ( there is an old thread about this somewhere where The Wizzard explains how these vents work) , and the center console for any cracks - if you see a crease in the leather, there is a crack underneath it. Check the hood for any damage ( look carefully underneath) or misalignmnet. There are other things to check but the foregoing are sometimes missed. Good luck!