Well I have this rattle in the front, it sounds like plastic on plastic and I only hear it at very low speeds (pulling out of a parking spot), any ideas?
If it is really plastic noises, then check the plastic cover peices below the car, could be loose. Also the front inner wheel arches had plastic lining layer, if theses comes loose it will rub with the tires at low speed. Good luck.
Metal sounds and clunks are harder to troubleshoot.