Oil Pipe Mercedes W211 W219 OM642 Gearbox Cooler Cooling Hose Line A6421807530

Oil Pipe Mercedes W211 W219 OM642 Gearbox Cooler Cooling Hose Line is an original lubrication system component for automatic transmissions, designed for high-end Mercedes models. The precisely engineered geometry of the pipe ensures stable transmission oil flow, which translates into smooth automatic transmission operation and reduces the risk of component overheating.

Specifications and technical data

• SKU: A6421807530
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6421807530
• Substitutable numbers: A6421807530, A 642 180 75 30, KD
• Gearbox type: Automatic
• Category: Oil Coolers & Lines

Purpose and function of the gearbox oil pipe

The offered pipe operates within the automatic transmission lubrication and oil cooling system, working in conjunction with components from the Oil coolers and hoses group. It is responsible for transporting the operating medium between the gearbox and other system components, maintaining proper pressure and oil flow in the OM642 engine used in W211 and W219 body styles.

A properly selected oil pipe reduces pressure drops, minimizes the risk of leaks, and supports a stable operating temperature for the transmission. This has a direct impact on shift quality, clutch durability, and the overall lifespan of the automatic transmission.

Benefits of using an original Mercedes pipe

Using an original oil pipe in an automatic transmission system provides a number of practical benefits:

• preservation of factory oil flow characteristics and operating pressure,
• secure fitment to mounting points and connectors in W211 and W219 models,
• reduced risk of leaks resulting from poor fitment of aftermarket replacements,
• consistency with other components of the oil lubrication and cooling system.

As a result, the pipe serves as a functional service solution when replacing worn or damaged components within the automatic transmission, without the need for system modifications.

Installation characteristics and application in automatic transmissions

The pipe has been designed to work with automatic transmissions, meaning it is adapted to the higher thermal and pressure loads typical of this type of gearbox. The design of the pipe allows for installation at original mounting points, which facilitates workshop work and reduces service time.

In practice, the pipe is used during:

• repairs following oil leaks from the gearbox or oil cooler area,
• comprehensive work on the automatic transmission lubrication system,
• preventive replacement of rubber and metal components exposed to thermal aging.

Product condition and service application

This item comes from the group of used OEM components, which allows for economical vehicle repair while maintaining the manufacturer's original specifications. This type of solution is particularly beneficial for premium class cars, where factory fitment and compliance with technical documentation are essential for the durability of the drivetrain.

If you are planning a comprehensive repair or upgrade of the oil lubrication and cooling system in your Mercedes and need other components from the same group, such as oil lines, oil coolers, or fittings, check out the available parts in the Mercedes oil coolers and hoses category.

Technical support and service knowledge

When working on cooling and lubrication systems, it is worth paying attention to the general condition of the installation and symptoms of engine overheating. Additional information on the impact of the oil cooler and the entire cooling system on engine lifespan can be found in the article Engine cooling system – overheating, repair, and used radiators, which discusses practical aspects of diagnostics and service.

If you are interested in a broader context regarding the use of original used components in premium cars, it is also worth reading the material Crisis in the new parts market? Why used originals for premium cars are the hottest trend in 2026, which describes the current approach to repairs using OEM parts from disassembly.