Mercedes W168 W169 Engine Water Coolant Breather Pipe Hose A6400101282

Mercedes W168 W169 Crankcase Ventilation Hose Vacuum Hose is a component from the Cooling System Hoses and Pipes category, designed for use in the first and second generation compact Mercedes A-Class models. It is responsible for stable vacuum routing and venting fumes from the crankcase ventilation system, which promotes smooth engine operation and proper interaction with engine accessories. This is a practical solution for users seeking a proven component structurally matched to the cooling and vacuum system in these models.

Specifications and technical data

• SKU: A6400101282
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6400101282
• Substitutable numbers: A6400101282, A 640 010 12 82
• Category: Coolant Hoses

Purpose and Function in the Engine System

The crankcase ventilation hose vacuum hose in Mercedes W168 and W169 models is responsible for the controlled venting of fumes from the crankcase and the stable maintenance of vacuum in selected engine circuits. A correctly selected component:

• supports smooth engine operation across the full range of loads,
• reduces the risk of leaks in the crankcase ventilation and vacuum areas,
• contributes to the proper functioning of associated components, such as control elements and cooling system components.

Thanks to its precise fit for the specific Mercedes platform, the hose maintains the correct routing geometry, which facilitates installation and minimizes stress in the system.

Construction, Fit, and Installation

The crankcase ventilation vacuum hose has been designed as a component compliant with Mercedes' factory specifications, which translates to appropriate connection diameters and a shape tailored to the engine bay of the W168 and W169. This solution allows for:

• secure seating on the spigots without the need for modifications,
• maintaining seal integrity under varying operating temperatures,
• preserving the correct routing of the hose relative to other cooling system components.

Using a component of this type is a good choice for users who want to restore proper functioning of the crankcase ventilation and vacuum system while maintaining reasonable service costs.

Role in the Cooling System Hoses and Pipes Category

Although the crankcase ventilation vacuum hose primarily operates in the area of crankcase ventilation and vacuum control, its routing and installation are linked to the cooling system. A correctly selected component from the Cooling System Hoses and Pipes category helps maintain order in the engine bay, reduces the risk of abrasion against other hoses, and facilitates servicing of the entire system.

If you are looking for other cooling system hoses and pipes for your Mercedes, check out our offer in the Mercedes Cooling System Hoses and Pipes category, where you will find a wide selection of compatible parts.

Why Choose an Original Mercedes Hose

An original crankcase ventilation vacuum hose for W168 and W169 models ensures compliance with the manufacturer's original design specifications. In practice, this means:

• maintaining proper circulation of fumes and vacuum in the engine,
• a reduced risk of engine operation problems resulting from leaks,
• easier diagnosis of potential future faults.

For users who want to better understand the impact of hoses and pipes on engine and cooling system operation, the article Engine Cooling System – Overheating, Repair, and Used Radiators, which describes the relationships between cooling efficiency and engine lifespan, will be helpful.

Summary of Application in Mercedes W168 and W169

The Mercedes W168 W169 Crankcase Ventilation Hose Vacuum Hose is a practical choice for drivers who want to restore proper functioning of the crankcase ventilation and vacuum system while maintaining factory-fit for compact A-Class models. This component from the cooling system hoses and pipes category supports orderly installation routing in the engine bay, which promotes stable unit operation and facilitates subsequent service activities. For Mercedes owners planning a broader range of engine accessory work, valuable tips on maintenance and parts selection can also be found in the guide How to Care for Engine Accessories in Popular Mercedes-Benz Models.