Global Parts 3411551 A/C Expansion Valve - Rear

Mercedes-Benz Rear A/C Expansion Valve

Global Parts 3411551 is a rear A/C expansion valve for select Mercedes-Benz SUVs and crossovers. It meters refrigerant flow before the evaporator so the system can absorb heat efficiently and deliver stable cabin cooling.

• Rear A/C expansion valve for Mercedes-Benz HVAC systems
• Helps regulate refrigerant flow into the evaporator
• Fits select 2006-2018 Mercedes-Benz GL, GLS, GLK, and R-Class models
• Part number 3411551 for direct replacement searches
• This part cross-references UAC EX9761C for the same application

Fitment Details

• Fits 2017-2018 Mercedes-Benz GLS450, rear
• Fits 2017-2018 Mercedes-Benz GLS550, rear
• Fits 2017-2018 Mercedes-Benz GLS63 AMG, rear
• Fits 2008-2016 Mercedes-Benz GL550, rear
• Fits 2010-2013 Mercedes-Benz GL350, rear
• Fits 2007-2013 Mercedes-Benz GL450, rear
• Fits 2013 Mercedes-Benz GL63 AMG, rear
• Fits 2010-2013 Mercedes-Benz GLK350, rear
• Fits 2006-2012 Mercedes-Benz R350, rear
• Fits 2007-2009 Mercedes-Benz GL320, rear
• Fits 2007-2009 Mercedes-Benz R320, rear
• Fits 2006-2007 Mercedes-Benz R500, rear

How It Works

The expansion valve reduces refrigerant pressure and controls the amount entering the rear evaporator. That pressure drop allows the refrigerant to boil at the correct point, which is essential for consistent cooling performance in Mercedes-Benz GL, GLS, GLK, and R-Class rear HVAC systems. Global Parts 3411551 is a practical replacement when servicing the A/C system on these vehicles.

Common A/C Problems It Can Address

• Weak rear air conditioning output
• Uneven cabin temperatures between front and rear zones
• Restricted refrigerant metering at the evaporator
• Erratic cooling after A/C service
• System performance loss caused by a worn expansion valve

Installation Notes

Replace the expansion valve during A/C service when the system has been opened or contaminated. Verify the rear application and match the vehicle by year, model, and position before installation. Proper evacuation, leak checking, and recharge procedures are required for correct operation.

Quality Assurance

Global Parts recommends replacing the expansion valve/orifice tube each time the A/C system is serviced. Part number 3411551 is built for the listed rear Mercedes-Benz applications and is referenced for direct-fit replacement searches.