Four Seasons 55579 A/C Refrigerant Discharge / Suction Hose Assembly

Mercedes-Benz A/C Hose Assembly

Four Seasons 55579 is an OE replacement A/C refrigerant discharge and suction hose assembly for select Mercedes-Benz applications. Built with aluminum and rubber construction, it is made for R134a systems and includes the required seals, bracket, manifold, muffler, and switch port provisions listed for this application.

Key Features

• Part number 55579 from Four Seasons Hose Assembly line
• Discharge and suction line design for HVAC refrigerant routing
• Aluminum / rubber construction for OE-style fit and function
• R134a refrigerant type
• Female O-ring ends with UNF O-ring discharge and suction connections
• Includes gasket or seal and O-rings
• Built with bracket, manifold, muffler, and switch port provisions
• OE replacement design for select Mercedes-Benz 300CE, 300E, and 260E models

Detailed Description

This Four Seasons hose assembly is engineered for Mercedes-Benz HVAC service where the refrigerant discharge and suction lines need to be replaced as a matched assembly. Part number 55579 is listed for 1986-1987 Mercedes-Benz 300E, 1987 Mercedes-Benz 260E, and 1988-1990 and 1993 Mercedes-Benz 300CE applications with the engine breakpoints shown in the fitment data. If you are searching for a Mercedes-Benz 300CE A/C hose assembly or a 300E refrigerant line replacement, this OE-style part number 55579 is the direct reference.

The assembly uses aluminum and rubber construction to follow the original routing and connection style used in the vehicle’s air conditioning system. It is specified for R134a refrigerant, includes green O-rings, and uses female O-ring discharge and suction end styles. The manifold, muffler, bracket, and switch port provisions are part of the assembly configuration, helping match the original system layout on the applicable Mercedes-Benz models. This part cross-references Gates 51854 for the same application.

What It Helps Fix

• Refrigerant leaks at aged hose sections or O-ring interfaces
• Cracked, hardened, or oil-soaked A/C hose material
• Loss of system pressure from damaged discharge or suction lines
• Improper A/C line routing after prior repairs
• Service issues related to worn manifold or switch-port hose assemblies

Installation Notes and Tips

Verify the engine breakpoint listed in the fitment notes before ordering. Compare the original hose routing, end style, bracket location, and switch-port configuration to the replacement part before installation. Replace the sealing components during service, evacuate and recharge the system with the correct R134a refrigerant procedure, and inspect the remaining A/C components for contamination or wear before returning the vehicle to service.

Quality Assurance

Four Seasons supplies OE replacement HVAC components, and this hose assembly is built to match the specified application details for proper fitment on the listed Mercedes-Benz models. Part number 55579 is supported by the published interchange references and vehicle-specific fitment data provided for this application.