Mercedes GL 420 CDI X164 Diesel OM629 EGR Cooler Exhaust Gas A6291400475

Mercedes GL 420 CDI X164 Diesel OM629 EGR Cooler Exhaust Gas is a specialized component of the exhaust gas recirculation system, designed for the OM629 series diesel engines in the GL 420 CDI X164 model. Thanks to its factory design, it ensures stable cooling of exhaust gases directed to the EGR valve, which promotes proper engine operation and reduces emissions. This is a solution for users who expect a technically matched component for their Mercedes.

Specifications and technical data

• SKU: A6291400475
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6291400475
• Substitutable numbers: A6291400475, A 629 140 04 75
• Fuel type: Diesel
• Category: EGR Parts & Valves

Purpose and function in the EGR system

The EGR cooler in the Mercedes GL 420 CDI X164 operates in the demanding environment of a diesel engine, where temperatures and thermal loads are particularly high. Its task is to lower the temperature of the exhaust gases directed to the EGR valve, which:

• stabilizes the exhaust gas recirculation process in the diesel engine,
• reduces the risk of overheating intake system components,
• supports the maintenance of correct combustion parameters,
• indirectly contributes to the reduction of nitrogen oxide emissions.

Thanks to a design tailored to the OM629 unit, the cooler works with the factory cooling and control system, which promotes repeatable, predictable operating parameters of the entire EGR system.

Compatibility and OEM compliance

The offered EGR cooler belongs to the EGR Valves and Parts group and has been designed for use in the exhaust gas recirculation system of the Mercedes GL 420 CDI X164 with a diesel engine. Using an OEM-compliant solution means:

• geometry matched to the factory manifold and EGR valve,
• adaptation to diesel engine operating parameters,
• possibility of installation in place of the original component without structural modifications.

As a result, the cooler is suitable both for standard replacement of a worn-out element and for repairs of the exhaust gas recirculation system after a failure.

Characteristics of the used component

The presented item is a used part, sourced from dismantling, which allows for combining technical fitment with a more favorable purchase cost compared to a new subassembly. In the case of EGR system components, it is important to maintain:

• proper patency of exhaust gas channels and coolant circulation,
• tightness of connections with the intake and cooling systems,
• stability of mounts and connection points.

Selecting a used EGR cooler consistent with OEM markings and interchangeable numbers allows for maintaining consistency with factory service documentation and facilitates future diagnostics.

Benefits of using a dedicated EGR cooler

Using the correct EGR cooler in the Mercedes GL 420 CDI X164 Diesel OM629 translates into a number of practical operational benefits:

• more stable operating conditions for the EGR valve and intake components,
• limitation of exhaust temperature spikes directed to recirculation,
• reduction of thermal loads in the cylinder head and manifold area,
• easier compliance with exhaust emission requirements for diesel engines.

For users who want to restore the proper operation of the exhaust gas recirculation system, choosing a component dedicated to a specific model and fuel type is a technically safe and predictable solution in the long term.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as EGR coolers, EGR valves, or recirculation pipes, check the available parts in the Mercedes EGR Valves and Parts category.

How to choose the right used EGR part

When selecting a used EGR cooler for the Mercedes GL 420 CDI X164, it is worth paying attention to compliance with manufacturer markings, engine type, and cooling system parameters. Comparing the structure of the element with the part installed in the vehicle and verifying information in service catalogs can be helpful. To better understand the principles of selecting components from the secondary market and avoid mistakes, it is worth using the practical tips described in the article No more bad purchases! How to professionally choose used car parts, saving time and nerves, where OEM compatibility and reference numbers are discussed in detail.