Coolant Ventilation Line O-Ring – A0009975711

Description

The Coolant Ventilation Line O-Ring (A0009975711) is a genuine OEM Mercedes-Benz sealing component designed to provide a leak-proof seal at the coolant ventilation line connection. It prevents coolant leakage, maintains correct system pressure, and ensures proper coolant circulation within the engine cooling system.

Manufactured to Mercedes-Benz factory specifications, this O-ring is made from high-quality, heat- and coolant-resistant elastomer material capable of withstanding high operating temperatures and pressure fluctuations. Replacing worn or hardened O-rings with genuine OEM parts helps prevent coolant loss, air ingress, and potential engine overheating.