Transmission Cooler Hose Mercedes W211 C219 OM642 Oil Line Right O/S A6421800430

Transmission Cooler Hose Mercedes W211 C219 OM642 Oil Line Right O/S is an original automatic transmission oil cooling system component, designed for Mercedes E-Class W211 and CLS C219 models equipped with the OM642 engine. This used hose provides a functional service solution, allowing for the restoration of proper oil circulation and stable operating temperatures for the automatic transmission.

Specifications and technical data

• SKU: A6421800430
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6421800430
• Substitutable numbers: A6421800430, A 642 180 04 30
• Location on the vehicle: Right
• Gearbox type: Automatic
• Category: Oil Coolers & Lines

Purpose and function of the oil hose

The described hose is a component of the system that transports transmission oil between the gearbox and the oil cooler. It is responsible for maintaining the correct temperature of the lubricating medium, which has a direct impact on the durability and performance of the automatic transmission in Mercedes W211 and C219 vehicles with the OM642 engine.

The placement on the right side of the vehicle ensures a perfect fit with the factory installation geometry, allowing the hose to work seamlessly with existing mounts and oil cooler fittings. This solution reduces the risk of stress, leaks, and improper oil line routing.

Benefits of using an original Mercedes hose

Using an original oil hose in the automatic transmission cooling system offers a number of practical benefits:

• maintaining the factory oil flow characteristics in the automatic transmission,
• proper heat dissipation through the oil cooler,
• reduction of the risk of transmission overheating under load,
• consistency with the factory installation routing on the right side of the vehicle.

As a result, the hose supports stable automatic transmission operation, which is particularly important in vehicles used in urban conditions, on the highway, or during towing.

Installation and operational characteristics

The oil hose is designed to work with the automatic transmission and the factory oil cooler in Mercedes W211 and C219 models. The design, tailored to the specific side of the vehicle, facilitates installation and allows for maintaining the original oil line routing without the need for modifications.

As an item in the Oil coolers and hoses category, the hose plays a key role in the working oil circuit, influencing:

• maintaining appropriate oil viscosity across a wide temperature range,
• reducing wear on internal transmission components,
• stability of gear shifts under various driving conditions.

Product condition and service application

The offered hose is a used part, making it an attractive solution for users looking for an economical yet original-compliant part for repairing the transmission oil cooling system. It is suitable both for replacing a damaged hose and for preventive transmission maintenance when signs of corrosion or leaks appear in the existing installation.

Selecting a hose dedicated to a specific model and mounting side minimizes the risk of fitment issues, which translates into more efficient service and a lower risk of oil leaks after repair.

Expanding the oil cooling system in your Mercedes

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

To better understand the importance of a functional cooling system in your vehicle and the impact of temperature on components, it is worth reading our guide: Summer heat vs. cooling system: used radiators and fans as a guarantee of savings, which describes the practical aspects of operating and servicing cooling components.