Has anyone experienced a ticking or knocking noise from the two lower corners of the windshield on their 2007 Scion TC?

I purchased my Scion in November of 2006. When the temperature gets less than 30 degrees, the ticking or knocking noise is present when going over bumps creating vibration. It sounds like a metal on metal knocking noise and it is very annoying. I can hear it with my radio turned up. There is a service bulletin on the two upper pins of the windshield. I had this done last year and it didn't fix the problem. Last winter, my car was in service 4 times and the problem was not resolved. It started to get warm outside and the problem went away. The service department told me to wait till next winter so they had more experience with this issue and I was not a test dummy.

Here we are December 2007 and the noise is back. Two days ago, I took my car to a different Toyota service location and received my car yesterday. They assured me the problem was fixed. While driving to work with the temperature at 26 degrees, the noise was present and worse than ever. I shouldn't have to put up with this noise 4 months every year. This is a new car. Can anyone give me any recommendations on what to do? Your response is appreciated.

 

Thanks for the posts. The rattling or nocking noise is coming from the two lower corners of my front windshield.

Here is the TSB I mentioned in a post before and this didn't resolve my problem.

http://www.matrixowners.com/tsb/TS-NV009-06.pdf

Thanks again