Mercedes X164 OM629 Oil Dipstick Guide Tube Pipe Line Hose A6290100666

Mercedes X164 OM629 Oil Dipstick Guide Tube Pipe Line Hose is a specialized component from the Oil coolers and lines group, designed for Mercedes diesel engines. It is responsible for the safe routing of oil in the dipstick area, which facilitates level checks and ensures stable operation of the diesel power unit. The used OEM component ensures factory-fit compatibility with the lubrication system in vehicles equipped with the OM629 engine.

Specifications and technical data

• SKU: A6290100666
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6290100666
• Substitutable numbers: A6290100666, A 629 010 06 66
• Fuel type: Diesel
• Category: Engine Oil Coolers & Lines

Purpose and function in the lubrication system

The oil dipstick guide tube hose in the OM629 engine operates in the immediate vicinity of the power unit, which is why it must maintain proper tightness as well as resistance to temperature and vibration. In a diesel system, it is responsible for:

• stable oil routing in the area of the dipstick,
• maintaining the proper circulation of the lubricating medium in the service area,
• reducing the risk of leaks at the critical oil level check point.

Thanks to this, checking the oil level in the diesel engine remains repeatable, and the readings on the dipstick are clear and reliable.

Compatibility with the OM629 Diesel engine

The element has been designed to work with the OM629 unit in the X164 body, which means maintaining the correct geometry, connection diameters, and hose routing relative to the engine block and accessories. In practice, this translates into:

• secure mounting at factory attachment points,
• no collisions with other components in the engine bay,
• proper hose routing in the dipstick zone, without tension or twisting.

Such a fit is particularly important in diesel engines, where the lubrication system operates under significant thermal and mechanical stress.

Benefits of using an original oil line

Using the original oil dipstick guide tube in a Mercedes X164 with an OM629 engine allows you to maintain the integrity of the entire lubrication system. Key advantages include:

• factory geometry and diameters ensuring compatibility with the rest of the oil installation,
• maintaining the manufacturer-designed oil flow path in the dipstick area,
• easier diagnostics of potential leaks due to the predictable routing of the line.

A used OEM element is a sensible choice when servicing the lubrication system if you are looking for a technically correct solution without the need for aftermarket parts with uncertain fitment.

Connection to the oil cooling system

Although the dipstick tube is not a cooler itself, it operates in the same functional zone where the state of the oil, which is also responsible for heat dissipation from the engine, is monitored. The correct oil level and circulation affect:

• stable operating temperature of the power unit,
• protection of components working with the oil cooler,
• reduced risk of overheating under heavy diesel load conditions.

If you want to better understand the relationship between the lubrication and engine cooling systems, as well as the impact of the oil cooler on unit durability, it is worth checking out our guide: Engine cooling system – overheating, repair, and used radiators.

System expansion – Mercedes oil coolers and lines

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as additional oil lines, connecting sections, or components supplying oil to the cooler, check out the available parts in the Mercedes oil coolers and lines category.

Summary

Mercedes X164 OM629 Oil Dipstick Guide Tube Pipe Line Hose is a practical choice when servicing the lubrication system in a diesel engine. The original design, matched to the OM629 diesel unit, facilitates maintaining tightness in the dipstick area and improves the comfort of daily service. This is a solution for users who expect technically correct installation and consistency with the factory oil system design.