Mercedes-Benz E S211 W211 Transmission Oil Cooling Line Pipe A2112700527

Mercedes-Benz E S211 W211 Transmission Oil Cooling Line Pipe is an original cooling system component designed for the supply and return of transmission oil between the gearbox and the radiator. Thanks to its factory geometry and connectors, it ensures stable operating pressure and the correct operating temperature for the automatic transmission, which translates into its durability and smooth performance. This solution is particularly recommended for cooling system repairs in W211/S211 generation E-Class models.

Specifications and technical data

• SKU: A2112700527
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2112700527
• Substitutable numbers: A2112700527, A 211 270 05 27, EM
• Category: Coolant Hoses

Function and role in the transmission oil cooling system

This pipe from the Cooling system pipes and hoses category is responsible for the safe transport of transmission oil between the gearbox and the heat exchanger. A correctly selected component:

• maintains the tightness of the oil circuit under pressure,
• ensures proper fluid flow across the full range of loads,
• minimizes the risk of automatic transmission overheating,
• reduces the possibility of leaks at connections thanks to factory-standard ends.

For Mercedes E-Class W211/S211 models, the proper operation of the transmission oil cooling system is crucial for the longevity of the gearbox, especially during city driving and under higher thermal loads.

Original fitment for Mercedes E-Class W211/S211

The transmission oil cooling line has been designed specifically for the body geometry and drivetrain of the Mercedes E-Class W211/S211 generation. This means:

• factory mounting points adapted to the chassis,
• connectors compatible with the original oil cooler and gearbox,
• properly routed pipe path, reducing the risk of chafing and vibrations.

As a result, this component can be used as a direct replacement for the factory pipe during the repair or upgrade of the transmission oil cooling system.

Condition, application, and benefits of installation

The offered pipe is a used component, which allows for an economical system repair while maintaining the manufacturer's original specifications. Replacing a worn or leaking pipe with a functional component of this type is particularly recommended when there are:

• traces of oil leaks near the radiator or gearbox,
• corrosion or mechanical damage on metal sections,
• cracks, fissures, or softening of flexible sections.

Selecting a pipe compatible with the Mercedes E-Class W211/S211 design helps maintain a stable transmission operating temperature, which has a direct impact on smooth gear shifting and reduced wear of internal components.

Technical support and additional information

Before installing the pipe, it is worth verifying compatibility with the specific engine and gearbox version of the vehicle using the OEM part number and interchangeable numbers available in the technical specifications. This facilitates the correct fitment of the component to a given Mercedes E-Class vehicle and reduces the risk of ordering errors.

If you are planning a comprehensive repair or upgrade of the cooling system area in your Mercedes and need other components from the same group, such as pipes, hoses, or additional sections for cooling medium routing, check the available parts in the Mercedes cooling system pipes and hoses category.

To better understand the impact of a functional fluid and oil circuit on the durability of the powertrain and transmission, it is worth reading the guide on our blog: Engine cooling system – overheating, repair, and used radiators. You will find practical tips on diagnosing overheating and the importance of the oil cooler in vehicles such as the Mercedes E-Class W211.