Four Seasons 33390 A/C Receiver Drier

Four Seasons 33390 Filter Drier Overview

The Four Seasons 33390 A/C receiver drier is a steel filter drier built for HVAC service on select Mercedes-Benz applications. It uses a desiccant-based design to help manage moisture in the refrigerant circuit and includes male insert O-ring connections, a service port, and a switch port for system-specific integration.

Compatible with Mercedes-Benz SL500, SL55 AMG, and SL600 applications, this Four Seasons Filter Drier line part is a direct-fit style replacement for vehicles that require a receiver drier in the A/C system. The 33390 part number is also referenced across multiple aftermarket cross numbers for the same application.

Key Features

• Steel A/C receiver drier construction
• Desiccant filter media for moisture control
• Male insert O-ring inlet and outlet connections
• Service port and switch port included in the design
• PRV-equipped configuration
• New part that meets or exceeds OEM requirements
• Gaskets/seals included
• Four Seasons 33390 replacement for select Mercedes-Benz HVAC systems

Product Details

The Four Seasons Filter Drier brand line focuses on A/C filtration and moisture management components for automotive HVAC systems. Part number 33390 is a steel receiver drier with a 4.000-inch body diameter and 7.000-inch body length, built with male insert O-ring connector types and a 0.375-inch inlet and outlet diameter. It also includes a 0.250-inch switch port diameter and does not use a moisture indicator window, sight glass, or replaceable desiccant. This part cross-references UAC RD10175C and Spectra Premium 0233390 for the same application.

Fits 1996-2002 Mercedes-Benz SL500, N/A. Fits 2002 Mercedes-Benz SL55 AMG, N/A. Fits 1998-2002 Mercedes-Benz SL600, N/A. Use this Four Seasons 33390 receiver drier when servicing the A/C system on these Mercedes-Benz models and replacing a moisture-control component in the refrigerant circuit.

Common Problems This Part Can Address

• Excess moisture in the A/C system
• Reduced refrigerant system efficiency caused by contaminated desiccant media
• Service issues related to a worn or saturated receiver drier
• Leaks at receiver drier connection points when seals are no longer serviceable
• HVAC performance problems on Mercedes-Benz SL500, SL55 AMG, and SL600 applications

Installation Notes and Tips

Replace the receiver drier whenever the A/C system has been opened for major service, compressor replacement, or contamination cleanup. Verify the inlet and outlet connection style, switch port, and service port layout before installation, and always use the correct O-ring seals for the refrigerant fittings. Evacuate and recharge the system according to the vehicle service procedure after installation.

Quality Assurance

Four Seasons 33390 is a new replacement part built to meet or exceed OEM specifications for the listed applications. Its steel construction, desiccant filtration, and OE-style connection layout support proper A/C system service on compatible Mercedes-Benz vehicles.