Mercedes W164 OM629 Diesel Bleed Line Pipe Hose Tube A6292000158

Mercedes W164 OM629 Diesel Bleed Line Pipe Hose Tube is an original component designed for diesel engines, which stabilizes the operation of the cooling circuit and facilitates the proper removal of air from the system. Thanks to its precise fit to the OM629 unit design, the hose ensures consistency of the cooling system operation and supports the maintenance of the correct engine operating temperature. This is a practical service solution for users of Mercedes W164 diesel models.

Specifications and technical data

• SKU: A6292000158
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6292000158
• Substitutable numbers: A6292000158, A 629 200 01 58
• Fuel type: Diesel
• Category: Vacuum Pumps

Function of the bleed hose in the cooling system

The bleed hose in the cooling system plays a key role in removing air bubbles from the coolant circuit. It reduces the risk of local overheating, improves temperature stability, and supports uniform cooling of the cylinder head and engine block. In diesel units such as the OM629, proper bleeding is particularly important due to high thermal loads.

Designed for OM629 diesel engines

The hose in question has been designed with the specifics of the OM629 series diesel engines used in the Mercedes W164 in mind. This means:

• geometry matched to the cooling system of this power unit,
• maintenance of proper coolant flow in the bleeding area,
• compatibility with factory engine equipment and port placement.

As a result, the hose can be integrated into the existing installation without the need to modify other system components.

Benefits of using an original hose

Using a bleed hose dedicated to a specific model and engine type brings measurable operational benefits:

• Stable cooling system operation – reducing the risk of airlocks and operating temperature fluctuations.
• Better protection of the diesel engine against overheating under high load conditions.
• Easier diagnostics and service – the component is consistent with the factory configuration.
• Possibility of use in preventive repairs when the cooling system has been opened or upgraded.

Component condition and service application

The hose comes from a group of used parts, which makes it a reasonable choice for maintenance repairs where functionality and structural compatibility with the cooling system are the priority. Such components are frequently used in professional workshops when restoring the efficiency of systems in high-mileage vehicles, where both proper operation and optimization of maintenance costs are important.

Connection to the fuel system and diesel diagnostics

In diesel engines, the correct operating temperature has a direct impact on the refinement and durability of fuel system components. For users who want to better understand the relationship between cooling and engine fueling, an article describing the diagnostics and operation of the fuel system – injectors, pumps, and fuel tank – will be helpful. More information can be found in the material: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration.

Other components from the Mercedes Vacuum Pumps group

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other components from the same group, such as vacuum lines, connectors, or vacuum control elements, check the available parts in the Mercedes Vacuum Pumps category.

To reduce vehicle downtime during repairs and efficiently assemble a set of used parts from a single source, it is worth learning practical tips on organizing workshop supplies. The following article may be helpful: how a wide assortment in one warehouse shortens vehicle downtime at the mechanic, which shows how to effectively plan repairs using professional used parts.