Denso 475-2018 A/C Expansion Valve

Denso New Expansion Valve for Mercedes-Benz HVAC

Denso New Expansion Valve 475-2018 is a block valve for the A/C system on select Mercedes-Benz models. It regulates refrigerant flow through the evaporator to help maintain proper cooling performance and stable system operation.

Key Features

• Block valve design for automotive air conditioning systems
• Separates the low and high sides of the A/C circuit
• Helps control refrigerant metering through the evaporator
• Built for select Mercedes-Benz CLK, E-Class, C-Class, SLK, and AMG applications
• Denso part number 475-2018 for direct catalog identification

Product Details

Denso’s New Expansion Valve line focuses on the calibration and refrigerant control needed for proper evaporator performance. When an expansion valve is out of specification, the evaporator can lose heat-exchange efficiency or freeze, which can lead to poor cabin cooling and added strain on the A/C system. This Denso 475-2018 expansion valve is listed for multiple Mercedes-Benz applications, including 1998-2003 Mercedes-Benz CLK320, 1999-2003 Mercedes-Benz CLK430, 1996-2003 Mercedes-Benz E320, and related C-Class, E-Class, SLK, and AMG models.

This part cross-references Four Seasons 38814 for the same application.

What It Helps Address

• Weak or inconsistent A/C cooling
• Evaporator icing or freeze-up
• Improper refrigerant metering across the evaporator
• Loss of cabin comfort from reduced system efficiency
• Service replacement for a worn or incorrect expansion valve

Installation Notes

Verify the vehicle’s A/C diagnosis before replacement and confirm the valve style matches the original block valve configuration. For Mercedes-Benz CLK320, CLK430, E320, CLK55 AMG, E430, E55 AMG, C230, C280, C43 AMG, SLK230, E300, S320, C36 AMG, E420, and C220 applications, match the part number and system layout to the original component before installation.

Quality Assurance

Denso draws on decades of A/C system engineering for global automakers, and this expansion valve is cataloged for correct vehicle-specific application matching.