Four Seasons 60042SK A/C Compressor Replacement Service Kit

Mercedes-Benz A/C Service Kit for Front Repairs

Four Seasons 60042SK is an A/C compressor replacement service kit built for Mercedes-Benz GLS, GL, and ML applications using R134a refrigerant. It combines the core service components needed for a front A/C repair, including PAG 46 compressor oil, a block-type expansion valve, and sealing components for a more complete compressor replacement job.

This Four Seasons A/C Installer Kit line is organized for service work that requires matched HVAC components rather than individual parts. The 60042SK kit is a direct-fit service solution for select Mercedes-Benz GLS350d, GL350, GL450, GL550, GL500, GL63 AMG, ML250, ML350, ML400, ML500, ML550, and ML63 AMG applications.

Key Features

• Four Seasons 60042SK A/C compressor replacement service kit
• Includes compressor oil with PAG Oil / 46 specification
• Includes filter drier, expansion valve, O-ring/gasket pack, and cap and valve kit
• Block-type expansion device with O-ring inlet and outlet connections
• Built for R134a refrigerant systems
• Receiver drier/accumulator dimensions: 1.500 in. diameter, 22.000 in. length
• Pad mount outlet fitting size: .402 in.
• Limited lifetime warranty

Detailed Description

Four Seasons 60042SK is engineered for Mercedes-Benz HVAC service where the compressor replacement process calls for matched refrigerant-system components. The kit includes the filter drier, expansion valve, compressor oil, necessary O-rings and gaskets, and a cap and valve kit, helping streamline the repair process on R134a systems. The included PAG 46 oil specification matches the listed application requirements, and the block-style expansion valve uses O-ring inlet and outlet connections for service-friendly installation.

For fitment-focused searches, this kit is used on Mercedes-Benz GL350, GL450, GL550, and GL63 AMG front A/C service applications, as well as Mercedes-Benz ML350 and ML63 AMG models. It also fits Mercedes-Benz GLS350d and select ML250, ML400, ML500, and ML550 applications listed in the vehicle coverage. This part cross-references Monroe Shocks & Struts (e.g., MUK60051, PK0500) for the same application.

What It Helps Address

• Compressor replacement service on Mercedes-Benz R134a A/C systems
• Loss of cooling after a compressor failure or system contamination event
• Restricted refrigerant flow caused by a worn expansion valve
• Moisture-related system issues addressed by replacing the filter drier
• Seal leakage at O-ring and gasket connection points

Installation Notes and Tips

Verify refrigerant type, oil specification, and vehicle fitment before installation. This kit is listed for front-kit applications and uses a pad-mount receiver drier/accumulator configuration with O-ring connections at the expansion valve. Replace system seals as required, evacuate the system properly, and recharge with the specified R134a refrigerant and PAG 46 oil amount for the vehicle application.

Quality Assurance

Four Seasons 60042SK is backed by a limited lifetime warranty. The kit is built to support service work on the listed Mercedes-Benz GLS, GL, and ML applications with the specified refrigerant and oil requirements.