Exterior rattle?

I have a 2013 Limited that has a rattle only at highway speeds and a temperature of around 80. Sounds like either rocks in the door or plastic rubbing together. Thought it might be the lower exterior door trim but using shims to tighten it doesn't make a difference. Any thoughts?

Thanks

Have you read post 15 in the following thread?

http://www.explorerforum.com/forums/showthread.php?t=410070

Peter

Thanks for the reply. This noise does not seem to be that high.

wryoung said:

Thanks for the reply. This noise does not seem to be that high.

Click to expand...

You would be very surprised how the sound travels.

Costs nothing to try. Just temporarily use a piece of tape on each one and take a drive to check.

If this fixes it for you please report back to let others know.

Now I not sure it is on the outside. Maybe the doors or B pillar. Will keep looking.