Since having the windows down more as the weather is getting nice I have noticed an odd noise coming from the front of the car outside. If you don't turn the wheel the noise isn't there. Start to move the wheel when the car is stationary and it appears. It is completely random as to when it appears and the frequancy is random too. When manoeuvring the car it is very noticable, turn wheel while reversing, click...click.......click. It seems to be getting worse. I can only describe the sound like a relay click on and off. A metallic sound. Is it my steering rack or something else?