I just got an 07 TL w/Nav and initially I did'nt notice it but I'm beginning to hear a chattering noise everytime I drive over bumps and not sure if it's the suspension or something beneath the car. Has anyone had a similar problem and if so what was done?

if you can duplicate the noise, take it to your local dealership. have the service advisor or tech go on a test drive and show them what is happening. it should be a warranty repair.

I took my TL back to the dealer last week and they told me that there was nothing wrong but to bring it back so that they can check it thoroughly. I'm sure they're not going to find anything wrong but I know for a fact there is...lets see what happens, I'll keep the site posted for any defects they might find.

Interesting, I also had the same concern and it seemed to be coming from the windows. I took it back to the dealership and they said that the design of the windows is to sit along these metal channels and the noise is "un-fixable" due to this design. I have a feeling the more I drive this baby, the more irritated I'll get so, I might check out another dealer and make the same complaint.