Four Seasons 33389 A/C Receiver Drier

Four Seasons 33389 A/C Receiver Drier

The Four Seasons 33389 is a steel A/C receiver drier built for Mercedes-Benz HVAC systems that use a male insert O-ring connection and service-port-equipped filter drier design. It is a new replacement part that meets or exceeds OEM requirements for select Mercedes-Benz SL models from 1990-1997.

Key Features

• Steel filter drier construction for A/C system service
• Male insert O-ring inlet and outlet fittings
• 3/8 in. inlet and outlet diameter
• Desiccant included to help manage moisture in the refrigerant circuit
• Sight glass included for system inspection
• Service port and switch port included
• Pressure relief valve included
• New part that meets or exceeds OEM specifications
• Four Seasons Filter Drier line for HVAC replacement applications

Detailed Description

Four Seasons 33389 is an A/C receiver drier designed for Mercedes-Benz SL320, SL500, SL600, 300SL, 500SL, and 600SL applications listed below. The steel body measures 3.000 inches in diameter and 7.000 inches in overall length, with male insert O-ring inlet and outlet connections sized at 3/8 inch. The unit includes desiccant, a sight glass, a service port, a switch port, and a pressure relief valve, making it a direct-fit HVAC service component for the specified vehicles. This part cross-references UAC RD1323C and Standard Ignition 27812 for the same application. Four Seasons 33389 is a practical replacement choice when servicing the A/C system on Mercedes-Benz SL models.

What It Is Used For

• Replacing a worn or contaminated A/C receiver drier
• Removing moisture from the refrigerant circuit
• Supporting proper refrigerant flow through the HVAC system
• Addressing A/C performance issues tied to restricted or aging drier components
• Restoring service access through the integrated port design

Installation Notes and Tips

Verify the inlet and outlet fitting style, body dimensions, and port layout before installation. Replace the receiver drier whenever the A/C system has been opened for major service, compressor replacement, or contamination cleanup. Use new O-rings and follow the vehicle service procedure for evacuation, leak checking, and recharge after installation. Fits 1994-1997 Mercedes-Benz SL320, N/A; Fits 1994-1997 Mercedes-Benz SL600, N/A; Fits 1994-1995 Mercedes-Benz SL500, N/A; Fits 1990-1993 Mercedes-Benz 300SL, N/A; Fits 1990-1993 Mercedes-Benz 500SL, N/A; Fits 1993 Mercedes-Benz 600SL, N/A.

Quality Assurance

Four Seasons 33389 is a new steel filter drier built to meet or exceed OEM specifications for the listed Mercedes-Benz applications. The Four Seasons Filter Drier line is used for HVAC replacement parts that match the required fitment and connection style for service work on Mercedes-Benz SL models.