Four Seasons 198390 A/C Compressor

Reliable A/C Compressor for Mercedes-Benz Models

The Four Seasons New Compressor 198390 is designed to restore efficient air conditioning performance in select Mercedes-Benz vehicles. Engineered for compatibility with R134a refrigerant, this A/C compressor ensures proper cooling and system reliability for models like the G63 AMG, G500, and GL450.

• Compatible with R134a refrigerant and Pag 46 oil
• Includes oil pre-filled for immediate installation
• Features a 6-groove serpentine pulley for optimal belt engagement
• Comes with clutch assembly included, clutch max diameter 4.33 inches
• 12-volt coil with 1 wire lead terminal type (pin)
• Mounting type: 3 tangent, one on rear head
• Includes three O-rings ([24635], [24659], [24683]) for proper sealing
• Compressor type: Nippondenso 7SEU17C

About the Four Seasons New Compressor Line

The Four Seasons New Compressor product line offers brand-new, direct replacement A/C compressors designed to meet or exceed original equipment specifications. The New Compressor 198390 is part of this line, providing a fully assembled unit with clutch and oil included, reducing installation time and ensuring system compatibility for Mercedes-Benz vehicles requiring the Nippondenso 7SEU17C compressor type.

Detailed Product Description

This Four Seasons A/C compressor (part number 198390) is engineered specifically for Mercedes-Benz models including the G63 AMG, G500, G550, GL450, GL500, GL550, ML63 AMG, ML350, ML500, and ML550. It operates with R134a refrigerant and is pre-filled with Pag 46 oil to maintain proper lubrication and system efficiency. The compressor features a 6-groove serpentine pulley with a diameter of approximately 4.33 inches, matching OEM specifications for smooth belt operation. The included clutch assembly has a maximum diameter of 4.33 inches and uses a pin-type terminal with a 12-volt coil and a single wire lead for electrical connection. Mounting is via a 3 tangent system with one mount on the rear head, ensuring secure fitment. The package includes three O-rings for sealing, but mounting hardware is not included.

Common Applications and Issues Addressed

• Restores A/C cooling performance in Mercedes-Benz G63 AMG and GL series vehicles
• Replaces failing or noisy compressors causing insufficient refrigerant compression
• Solves clutch engagement problems with included clutch assembly
• Addresses oil leakage and refrigerant loss with included O-rings
• Eliminates pulley or belt slippage due to worn or damaged compressor pulley

Installation Notes and Tips

• Ensure system is evacuated and flushed before installation to prevent contamination
• Verify compatibility with vehicle refrigerant type R134a and use Pag 46 oil as specified
• Check pulley alignment and belt condition during installation
• Use proper torque specifications for mounting bolts; mounting hardware not included
• Replace O-rings with those provided to maintain system integrity and prevent leaks

Quality Assurance and Warranty

The Four Seasons New Compressor 198390 is a new, direct replacement part manufactured to meet OEM standards for fit, form, and function. It includes pre-filled oil and clutch assembly to facilitate installation and reliable operation. While mounting hardware is not included, the compressor is designed for secure mounting on specified Mercedes-Benz models. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.