My 1998 S70 has developed a noise coming from ( I think) driver's side front tire area. It sounds like a piece of plastic stuck to the tire and changes rythym as I speed up and slow down. It stops on a turn or if I go over a bump. Lokked for anything stuck in between the treads. Car has 135k Kms. TOTAL brake job .. front, back , calipiers ( as they had rusted from sitting in driveway for 3 months) and emergency brake last June. Any suggrestions when I go to a Mech. and ask him to find/fix the noise. Brian