I am driving Swift sine 1 Yr plus. Now almost 17000 driven. There is some plastic sound from left rear which Suzuki is unable to diagnose since FFS and so on. They say its normal working of shocks but I do not agree. Although the sound in neither increasing nor any damage has occurred, it is an irritant at times particularly when driving on concrete pavement particularly at very low speeds. No issue in suspension or shocks so far and nothing loose in trunk. Kindly help, how to rectify?