Had to go rescue my Wife yesterday. Her 06 Chry 300 would not shift out of park. Found out that this is a very common problem on the LX platform. Has a pink interlock lever inside the shifter made of plastic. The plastic where the spring attaches apparently gives way. I found a way to get it into gear and get home, but I'll have to disassemble the shifter completely and repair or replace the pink plastic thingy.