The 2000-2006 Mercedes Benz CL500 is built with the following suspension components:
2000-2006 Mercedes Benz CL500 Hydraulic Struts (x4)- a plastic and rubber bag that is fitted onto a strut that uses pressurized hydraulic fluid as a cushion instead of a metal coil spring to hold a vehicle off of the ground and off of its wheels. These struts are controlled by the suspension control module, which is also responsible for redistributing hydraulic fluid to the struts as a means of weight distribution while cornering. All hydraulic springs all go bad at about the same rate. If one is leaking, the others will not be far behind. For a proper repair, all of them need to be replaced at the same time.
2000-2006 Mercedes Benz CL500 Height Sensors (x4) - a linkage located near each wheel of a vehicle with any electronic suspension that, either mechanically or electronically, constantly measures the height of the vehicle, and reports this information back to the control module so that the computer can identify if changes in height need to be adjusted accordingly. The ride height sensor is a moving part, and like all moving parts, they will eventually wear out.
2000-2006 Mercedes Benz CL500 Hydraulic Lines- tubes that run from a hydraulic pump to the hydraulic struts, which carry pressurized hydraulic fluid to hydraulic struts in order to adjust the height of the vehicle, respectively.
2000-2006 Mercedes Benz CL500 Hydraulic Pump- if your Mercedes has hydraulic suspension instead of air suspension, then the hydraulic steering pump will also serve as the reservoir for the hydraulic fluid going into the struts.
2000-2006 Mercedes Benz CL500 Dryer- prevents moisture build-up inside of hydraulic suspension parts.
2000-2006 Mercedes Benz CL500 Suspension Control Module- a computer which is responsible for the operations of the hydraulic suspension system and maintaining the vehicles correct ride height.
2000-2006 Mercedes Benz CL500 O-rings- Although they are the least expensive parts of the hydraulic suspension, they are responsible for maintaining the seal where all of the hydraulic lines connect. Be sure to replace the O-rings when repairing any hydraulic suspension system.