Vibration And Braking Problem On A4

Hi Guys, Can anyone tell me if they've ever experienced a vibration from the brake pedal and a noise that sounds like a thick cable being plucked and resonating up through the brake pedal. This happens when I brake and the vehicle is about to come to a standstill. (95 A4 1.8) Bearing in mind the brake pads and discs are fine and this problem only occured immedialty after I left the audi garage after having my track control arm replaced under a recall....

Any help appreciated...