Four Seasons 4646NK A/C Compressor and Component Kit

Complete A/C Kit for Mercedes-Benz ML-Class

Restore cabin cooling with the Four Seasons Complete A/C Kit 4646NK. This kit combines the major air conditioning service components needed for a Mercedes-Benz ML320, ML430, ML500, or ML55 AMG equipped with a 7SB16C compressor and R134a refrigerant.

Four Seasons Complete A/C Kit 4646NK is built around a new compressor and matched service parts for a straightforward HVAC repair on select Mercedes-Benz ML-Class SUVs.

Key Features

• Complete air conditioning kit with new compressor
• Includes compressor oil
• Uses R134a refrigerant
• Block-type expansion device
• Insert O-ring inlet and outlet connections
• Receiver drier/accumulator included with pad mount outlet fitting
• Limited lifetime warranty

Product Details

This Four Seasons Complete A/C Kit is engineered for select Mercedes-Benz ML320, ML430, ML500, and ML55 AMG applications that use the 7SB16C compressor. The kit includes a new compressor, filter drier, expansion valve, oil, and O-rings, giving you the core components needed to service the system in one order. The 4646NK part number is a direct reference for shoppers looking for a Mercedes-Benz ML320 A/C compressor kit, a Mercedes-Benz ML430 air conditioning repair kit, or a Mercedes-Benz ML55 AMG compressor replacement with R134a refrigerant.

Four Seasons Complete A/C Kit is the brand line for bundled HVAC service parts that pair the compressor with matched system components. That approach helps simplify parts selection when replacing a worn compressor and related A/C hardware on the same vehicle platform. This part cross-references Four Seasons (e.g., 4646NK) for the same application.

What It Helps Fix

• Weak or no cabin cooling
• Compressor noise or compressor failure
• Moisture contamination in the A/C system
• Restricted refrigerant flow from a failing expansion valve
• System performance loss after compressor replacement

Installation Notes and Tips

Verify the vehicle uses a 7SB16C compressor before ordering. Confirm R134a service requirements, match the inlet and outlet connection style, and replace the receiver drier/accumulator when servicing the system. Flush the system as needed, evacuate properly, and charge with the correct refrigerant and oil specification for the vehicle.

Quality Assurance

Four Seasons 4646NK includes a limited lifetime warranty. It is a complete A/C kit for select Mercedes-Benz ML-Class models, built to support a proper compressor replacement and related HVAC service.