my 300 touring wont shift into park,all other gears work,but springs,back,

sounds like possibly a cable problem. have someone shift it while you watch linkage on trans. if its binding disconnect cable and shift lever by hand and see if you get park, if so replace cable

The SHIFT INTERLOCK LATCH breaks all the time on these cars, it is a parts of the shifter assembly. Check into that parts to see if it is broken.

I am a trans guy. I have seen this problem before. You will need a new shifter cable but you need to fix another problem with the shifter cable. The manual linkage in the trans need some attention. It can be costly but how I go about fixing this problem is. 1. I replace a cable 2. Remove the valve body and install a transgo update kit 3. Hone the trans case were the shifter rod goes through. What the problem is that the rod is too tight in the trans housing. I put the kit in the valve body is due to the problems with this transmission that make this trans go bad. If there is no problems with the trans then there won't be any problems in the future. But most of the time the car has 160000 miles on it and the trans needs help. So at that point I give out my menu price of a trans overhaul. In this case i can repair this car for about 2000