Rattle in right rear tire on 2001 Mercedes-Benz C320

I have a rattle and high squeal noise in my right rear tire. Its worse when I turn right....any ideas?

Im not sure you may have an axle problem,but i would check the wheel right away,the rattling may be a lug nut that has come loose and is rattling inside the hubcap.or maybe a wornout wheel bearing.