Product Overview

The hose connector, OEM number A1669971459, is the coolant hose connection fitting used across an unusually wide range of Mercedes-Benz models, model years 2006-2019, including the GLE, GL, GLS, ML-Class, S-Class, C-Class, and E-Class. This precision quick-connect fitting links coolant hoses to the radiator, thermostat housing, or auxiliary pump, and because it spans so many Mercedes model lines and nearly 15 years of production, it's a genuinely high-turnover part for anyone stocking Mercedes cooling system components.

Worn or cracked units typically show up as coolant leaks near the connection point, a sweet coolant smell in the engine bay, or coolant loss requiring frequent top-ups. GSK Auto manufactures this hose connector to OEM specification at our Ningbo, China facility, with every unit tested before packing. We supply at wholesale volume with low MOQ and support private label packaging, with our team available to confirm fitment before shipping.

Replacement OEM Numbers

Cross-Reference OEM Number

1669971459, A1669970659, A1668304096

(Confirm against your VIN or chassis code before ordering - this fitting spans an unusually wide range of Mercedes models and years, so it's worth double-checking the exact chassis and engine before ordering at volume.)

What Is a Coolant Hose Connector?

Function: The coolant hose connector links two sections of the cooling system, such as a hose to the radiator, thermostat housing, or auxiliary pump, sealing the joint so coolant can flow between components without leaking.

Working Principle: The fitting uses a locking collar and molded O-rings, with push-to-click engagement creating a uniform seal on the mating spigot. The polymer body handles thermal expansion while the O-rings maintain a tight seal even as the engine moves and heats.

Importance: These plastic connectors are a known wear point on many Mercedes cooling systems, since the polymer material becomes brittle with age and heat cycling, making cracked connectors a common source of coolant leaks even when the hoses themselves are otherwise fine.

Common Failures & Signs: Plastic material becoming brittle and cracking from age and heat cycling. Coolant leaks at the connection point, sometimes appearing as pink or green puddles. A sweet coolant odor noticeable in the engine bay. Coolant loss requiring frequent top-ups, sometimes accompanied by a weak heater or rising engine temperature.

Key Features

OEM-standard fitment - matches factory connector dimensions and locking mechanism for the A1669971459 application.

Precision manufacturing - molded O-rings provide a consistent 360-degree seal on the mating spigot.

Long service life - built to resist heat, vibration, and chemical exposure.

Excellent fitment - direct replacement, no modification required.

Corrosion resistance - polymer construction resists coolant and moisture degradation.

Reliable performance - consistent sealing matching factory specification.

Benefits

Importers - one part number covers an unusually wide range of Mercedes models, simplifying inventory.

Wholesalers - steady demand from a known common wear point across multiple popular Mercedes platforms.

Repair Shops - tool-light service (release clip, pull off, replace, lock) makes this a quick, high-margin repair job.

Distributors - private label packaging available for building a branded catalog.

End Customers - restored cooling system integrity and elimination of coolant leaks.

Packaging & Shipping

Standard export packaging, sized for a hose connector component. Customized packaging available for distributor branding. OEM-style and private label printing on request. Container loading handled directly, with mixed-SKU consolidation for smaller orders. Worldwide shipping to Europe, North America, South America, the Middle East, Africa, and Southeast Asia.

Why Choose GSK Auto

GSK Auto manufactures factory-direct, keeping pricing tied to production cost. This hose connector is built to OEM specification and tested before packing. We support low MOQ, private label packaging, and worldwide shipping, with our technical team available to confirm fitment before you order.

Call to Action

Sourcing coolant hose connectors for Mercedes GLE, GL, GLS, ML, S-Class, C-Class, or E-Class vehicles? Contact GSK Auto for a wholesale quote, catalog, or OEM/private label cooperation.