Mercedes-Benz S W220 Left Gearbox Oil Cooler Pipe Line Hose Diesel A6131801030

Mercedes-Benz S W220 Left Gearbox Oil Cooler Pipe Line Hose is a specialized component of the automatic transmission lubrication system, designed for the precise delivery and return of oil to the cooler. As an original Mercedes part, it ensures proper routing of the operating medium and stable operating conditions for the automatic transmission in diesel-powered vehicles.

Specifications and technical data

• SKU: A6131801030-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6131801030
• Substitutable numbers: A6131801030, A 613 180 10 30, BG
• Location on the vehicle: Left
• Fuel type: Diesel
• Category: Automatic Transmission

Purpose and function in the automatic transmission system

The described hose is a component of the oil cooling system in Automatic transmissions used in the Mercedes-Benz S-Class W220 generation with a diesel engine. It is responsible for the safe delivery of transmission oil to the cooler and its return, which helps maintain a stable operating temperature for the transmission during city driving, highway travel, and under increased load conditions.

The placement on the left side of the vehicle ensures a perfect fit with the factory routing of lines, brackets, and mounts in the W220 chassis. This maintains the correct geometry of the system, minimizing stress on the connections and the risk of chafing or leaks during long-term operation.

Benefits of using an original oil cooler hose

Using an original oil cooler hose in an automatic transmission provides measurable operational benefits:

• factory fitment for the oil cooling system in the Mercedes-Benz S W220 with a diesel engine,
• properly selected internal hose diameter, supporting the correct flow of transmission oil,
• geometry adapted for routing on the left side of the vehicle, in accordance with the manufacturer's original design,
• stable automatic transmission operation by maintaining the correct oil temperature.

For the user, this means more predictable transmission performance, reduced risk of overheating, and the ability to safely utilize the potential of the diesel engine in daily driving.

Installation and operational characteristics

The gearbox oil cooler hose is designed for installation at the factory mounting points on the left side of the chassis. The hose construction is adapted to the layout of the installation in the engine bay and around the oil cooler, which facilitates the mechanic's work and reduces replacement time.

In practice, installation involves disconnecting the old hose from the transmission and oil cooler ports, and then connecting the new component while maintaining the correct sequence and tightening torques for the connectors. A properly installed hose ensures system tightness, stable oil flow, and resistance to vibrations and temperature changes typical of diesel units.

Application in diesel-powered vehicles

Automatic transmission systems paired with diesel engines in the Mercedes-Benz S W220 operate under higher torque loads, which translates into greater demands on the oil cooling system. A properly selected oil cooler hose supports the maintenance of stable transmission operating parameters, especially during high-speed driving, towing, or intensive use in city traffic.

Replacing the hose with an original component is recommended in the event of visible signs of corrosion, chafing, leaks, or upon detecting a drop in oil pressure in the transmission cooling system. This helps reduce the risk of more serious transmission failures and costly repairs.

Support for selecting transmission system components

If you are planning a comprehensive repair or upgrade of the transmission area in your Mercedes and need other elements from the same group, such as oil lines, oil coolers, or additional installation components, check the available parts in the Mercedes Automatic Transmissions category.

For users who want to better understand the specifics of transmission operation and consciously plan repairs, the guide describing typical failures and principles for selecting used transmissions will be helpful – details can be found in the article Transmission: manual, automatic, or DSG – typical failures and a guide to buying a used transmission.