I have a 2007 SL550. The other day when I cranked the car I heard a loud pop from the rear right wheel area, followed by the smell of what I assume was hydraulic fluid. I immediately shut the engine off and have not cranked it since. Several years ago I changed the hydraulic damper located on the starter and changed the ABC fluid, so I have done some work on the system. What is located on the rear right that needs to be repaired to get me driving again? Thanks