Dorman 598-173 Exhaust Gas Recirculation (EGR) Line

Dorman 598-173 EGR Tube for Mercedes-Benz

Dorman 598-173 is a stainless steel exhaust gas recirculation (EGR) tube built to match the fit of the original line on select Mercedes-Benz vehicles. It is designed to restore proper exhaust gas routing when the existing EGR line is restricted by deposits in the EGR system.

Key Features

• Stainless steel construction for durability in high-heat exhaust environments
• Direct-fit EGR tube designed to match the original line shape and dimensions
• Tube ends with barrel-style connection points
• 7.5-inch length with 0.625-inch inside diameter and 0.625-inch outside diameter
• No mounting hardware included
• Cross-references Genuine 1121400108 for the same application

Detailed Description

This exhaust gas recirculation line is engineered for Mercedes-Benz EGR service where the factory tube has become clogged, damaged, or no longer seals correctly. By restoring the path between EGR components, Dorman 598-173 helps return the system to proper exhaust flow and air-fuel balance. It is a practical replacement for vehicles such as the Mercedes-Benz E320, ML320, and SL500, as well as many other V8 and V6 applications listed in the fitment data.

Use Dorman 598-173 when you need an OE-style EGR tube replacement for Mercedes-Benz G500, ML500, CLK320, C240, or E430 applications. The stainless steel construction is suited to the heat and corrosion exposure common in emission control service, and the formed tube profile is intended to align with the original routing on the vehicle.

What It Helps Address

• Restricted exhaust gas recirculation flow caused by carbon buildup
• Cracked, rusted, or leaking EGR tube sections
• Emission system faults related to improper EGR routing
• Rough idle or drivability concerns tied to EGR flow issues
• Air-fuel imbalance caused by a malfunctioning EGR line

Installation Notes and Tips

Verify vehicle-specific fitment before installation. This part fits 1996-2008 Mercedes-Benz applications listed in the fitment table, including 2002-2008 Mercedes-Benz G500, 2002-2007 Mercedes-Benz ML500, 2000-2006 Mercedes-Benz CL500, 1998-2006 Mercedes-Benz E320, and 1996-2006 Mercedes-Benz SL500. Inspect adjoining EGR components for carbon deposits, damaged seals, or corrosion before installing the new tube. Clean mating surfaces thoroughly so the replacement tube can seat correctly.

Because mounting hardware is not included, reuse serviceable original hardware or source the correct fasteners as needed. Confirm the tube orientation and connection style against the removed part before final tightening.

Quality Assurance

Dorman designs replacement emission control components to match original fit and function on specified vehicles. Part number 598-173 is built as a direct replacement EGR tube for Mercedes-Benz applications where OE-style fit and stainless steel construction are required.