159 knocking noise in front left wheel area
Hello there. I have a 2007 159 sportwagon with 60,000 miles on it. In the last couple of weeks I have been noticing an increasing knocking noise on the front left side. It was intermitent but over the last couple of days it has become more persistent. I removed the wheel and could not see anything loose. However, I noticed a piece of white plastic moulding stuck under the bottom edge of the rubber gaitor that surrounds the shock absorber. It came away very easily. It is about 2 inches high and has ridge on the outside near the top and a ridge on the inside near the bottom . It is about 1 inch wide and has clearly broken off a larger probably circular part.
Does anyone know what this could be and why it may have broken. I guess also what needs fixing.
Thanks in anticipation of your help.