Four Seasons 39210 A/C Expansion Valve

Four Seasons 39210 Expansion Valve

The Four Seasons 39210 expansion valve is a block-type A/C flow restrictor built for R134A systems and direct replacement service on select Mercedes-Benz applications. It uses an aluminum body with female insert O-ring connections and meets or exceeds OEM requirements for a precise refrigerant metering solution.

Key Features

• Brand: Four Seasons Expansion Valve
• Part number: 39210
• Block type A/C expansion valve for R134A refrigerant systems
• Aluminum construction with aluminum finish
• Female FIO suction and liquid connections with insert O-ring sealing
• Mounting hole quantity: 2
• Style: w/o solenoid
• Super heat setting: 5.500
• Meets or exceeds OEM specifications
• Direct replacement for Mercedes-Benz SL500, S500, E320, and related models

Product Details

Four Seasons 39210 is part of the Expansion Valve line, a service-focused A/C flow control product line for vehicles using a block-style valve layout. This valve is engineered for Mercedes-Benz HVAC systems that require accurate refrigerant expansion control to maintain proper evaporator performance. It cross-references Global Parts Distributors LLC 3411278 for the same application.

Compatible With 1991-2002 Mercedes-Benz applications including SL500, SL600, SL320, SL55 AMG, SL60 AMG, CL500, CL600, S420, S500, S600, S320, S350, E300, E320, E420, E500, and 300CE/300D/300E/300SD/300SL/300TE models listed in the fitment data. For Mercedes-Benz SL500 expansion valve replacement or Mercedes-Benz S500 A/C expansion valve service, this part number 39210 provides the specified connection style and refrigerant compatibility.

Common Uses

• Restores refrigerant metering when the original valve is restricted or worn
• Addresses uneven cabin cooling in Mercedes-Benz A/C systems
• Helps correct evaporator performance issues caused by flow control problems
• Supports service repair on R134A-equipped HVAC systems
• Replaces a leaking or damaged expansion valve body

Installation Notes

Verify the vehicle uses the listed block-type valve layout, R134A refrigerant, and the specified suction and liquid fitting sizes before installation. Replace sealing O-rings as required during service, and confirm the mounting hole pattern and line orientation match the original component. This part is listed for N/A position applications in the fitment data.

Quality Assurance

Four Seasons 39210 is listed as meeting or exceeding OEM requirements for the specified applications. The aluminum construction and OE-style connection design support accurate fitment on the Mercedes-Benz models shown above.