hi all sifus,my e46 keep on having a funny sound at front left under below situation:1. when start engine in the early morning, i will hear some sound like something is scrubbing. Once i let the car to warm up for about 10-15 minutes, the sound is getting less2. whenever i turn left a little more, there will be some sound. If the car is not warmed up and I turn left, the sound is obvious3. when doing a right U turn , the sound can be heard as wellAnyone came across this before and what could be the potential cause before I bring to any workshop?