My car was built at the very end of September so I have what appears to be the new hardware for lane-assist, etc.. It also seems like I have a new windshield version which doesn't have that "black area" behind the rear view mirror where bridge toll transponders are supposed to go. When I crossed a bridge today, I placed a newly-registered transponder in this same area but it didn't beep. It could be that this is just a new transponder and it's either not working or I didn't register it with the toll authority properly, but I wonder if the windshield is to blame in this case. Has anyone had any similar experiences? In my case this is in California and it's the FasTrak transponders.