Ok I dont know if this is only in florida, but its common to find S5 tail lights seperating alittle. I tried looking for previous thread on it but either I cant find it or I must be a retard.

Any way point is, is there anyway to fix this like tearing apart the lights or gluing them back together?

 

The adhesive holding the two halves together can be heated to get it to stick again. A heat gun, hair dryer or an over at ~200F can work.

 

^ +1

I took mine off and used a heatgun [lightly...] on them and they sealed right back up and haven't come apart again yet. ^_^ [You could leave them on the car, just be careful not to over heat them and melt stuff you don't want to..]

 

same thing is beginning to happen to my driver side light.