Genuine 1639970345 A/C Line O-Ring - Upper

Mercedes-Benz A/C Line O-Ring Seal

This Genuine A/C line O-ring is a direct-fit sealing component for the air conditioning line to receiver/drier connection. It is specified for select Mercedes-Benz ML-Class applications and helps maintain a secure seal at the upper A/C line joint.

• Genuine OE replacement part
• Part number: 1639970345
• 10x7mm seal size noted for the application
• Upper A/C line to receiver/drier location
• Fits select Mercedes-Benz ML320, ML430, ML500, ML350, and ML55 AMG models

Fitment Details

• Fits 1998-2003 Mercedes-Benz ML320, upper; 10x7mm; A/C Line to Receiver / Drier
• Fits 1999-2001 Mercedes-Benz ML430, upper; 10x7mm; A/C Line to Receiver / Drier
• Fits 2000-2003 Mercedes-Benz ML55 AMG, upper; 10x7mm; A/C Line to Receiver / Drier
• Fits 2002-2005 Mercedes-Benz ML500, upper; 10x7mm; A/C Line to Receiver / Drier
• Fits 2003-2005 Mercedes-Benz ML350, upper; 10x7mm; A/C Line to Receiver / Drier

What This Seal Helps Address

• Refrigerant leakage at the A/C line to receiver/drier connection
• Loss of system pressure from a worn or flattened O-ring
• Moisture intrusion at the sealed joint
• Poor sealing after A/C line service
• R134a system sealing concerns at the upper line connection

Installation Notes

Verify the 10x7mm size and the upper line-to-receiver/drier location before installation. Clean the sealing surfaces thoroughly, inspect the mating components for damage, and lubricate the O-ring with the correct refrigerant oil during assembly. Confirm the part number 1639970345 against the vehicle’s A/C connection before reassembly.

Quality Assurance

Genuine OE-style sealing part for the listed Mercedes-Benz applications. Part number 1639970345 is intended for direct replacement use on the specified ML-Class models.