so for awhile now when i put my car on reverse and try parking it i hear a rattle coming from the rear right side..its been getting louder.keep in mind i live on a hill and when i reverse im going up hill since i have to parallel park. Any ideas what it might be? When i have time ill try recording some videos clips so you guys can hear it.Thanks in advance!

 

Rattling from the rear right (passenger) side of the car is probably the muffler heat shield coming loose. There are three 10mm bolts holding it on, try tightening them.