Hi All. jacked the car up to change my front brake pads after managing to source some wood to increase the height so I could get the jack under the side. Also took off the side skirt and found lots of silt / dirt is this common? After returning the car to the ground I noticed the distance from the top of the rear tyre on the passenger side is a lot lower than that of the drivers side. Could this mean one of my springs has given up the ghost? If so how much is it likely to cost?? 