2007-2014 Mercedes-Benz CL550 RWD 4 Wheel Hydraulic Suspension Conversion Kit (MU54F)

Replaced Components
The 2007-2014 Mercedes Benz CL550 is built with the following suspension components:

2007-2014 Mercedes Benz CL550 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.

2007-2014 Mercedes Benz CL550 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.

2007-2014 Mercedes Benz CL550 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.

2007-2014 Mercedes Benz CL550 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.

2007-2014 Mercedes Benz CL550 Dryer- prevents moisture build-up inside of hydraulic suspension parts.

2007-2014 Mercedes Benz CL550 Suspension Control Module- a computer which is responsible for the operations of the hydraulic suspension system and maintaining the vehicles correct ride height.

2007-2014 Mercedes Benz CL550 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.



Suspension Failure Signs
There are classic symptoms of a failed or leaking hydraulic suspension system in the 2007-2014 Mercedes Benz CL550. Early detection of a bad suspension is the key to maintaining the vehicle's overall health. Look for an inability of the CL550 to reach and maintain its proper ride height. A sudden height variance between different sides of the CL550 is also a red flag. This may look like one sagging end, one inflated end, a squatting appearance, or a shifting lean from side to side. A bad suspension will wear out the air compressor; if the compressor is running too often or has already ceased working then suspension failure is advanced. At this stage, a suspension warning light will illuminate on the dash.

OEM Replacement Cost
'+ Front Hydraulic Strut Assemblies ($2,000/strut)
+ Rear Hydraulic Strut Assemblies ($1,700/strut)
+ Hydraulic Pump ($1,300)
+ Hydraulic Reservoir ($400)
= Over $9,000 (but that doesnt include replacing electronic components that are known to fail such as the height sensors).

Aftermarket Replacement Cost
NEW REPLACEMENT STRUTS ARE UNAVAILABLE!