"Clicking" or "knocking" caused by rear seat pull down lever.
 

Anyone else have this sound from their rear seat pull down lever thing? I know it comes from that because I can replicate it by swinging them myself. It's caused when they hang low and swing back and forth while driving. Once I put the seats down, it goes away. But I utilize my rear seat, plus the exhaust is too loud with the seat down. When I push the rear seat back up, the sound is gone for about a day. The car sits for a bit, and then the noise comes back.

I've always had a weird clunk over certain bumps from driver rear. Never took the time to look into it

There was a thread awhile back that mentioned it. I remember someone put some WD-40 back there and said it helped, but only for a few days. I tried the same and it did nothing.

I'll try next time I go out driving with rear seat down see if that clunk goes away

Many of the twins had the rattle (clunk) from the rear package shelf area. My dealership did a pretty good in depth study on mine and found when they took the package shelf out and test drove the car there was no clunk. Putting the package shelf back in caused the clunk. Their fix was to put a strip of adhesive foam rubber across the top of the cross member running under the package shelf, which allowed cushioning between the shelf and the cross member,and my clunk is gone.

That's very interesting! Would it be hard for you to get pictures of that? It would be much appreciated.

The only camera I have is my cell phone and I don't have a hook-up to my computer. Sorry. If you open your deck lid you will see a three part metal bar running from left to right directly under your rear package shelf. The thin (perhaps) 1/4 inch thick foam, with adhesive backing, was placed directly on top of that metal cross bar, sticky side down, and it buffers where the package shelf and that cross bar had previously been touching each other. I hope this description helps.