Hi I had my brakes renewed front and back in January and after a few weeks I noticed they squeak when braking at slow speeds (up to traffic lights, junctions etc) but not when braking at high speeds (motorway etc) I complained to the Vauxhall dealer who did this and was told it's because they can't put asbestos (I think) into the units any more so they use tiny iron filings and they squeak because of that and nothing can be done about it. Has anyone else experience this? John