Mercedes X164 OM629 Fuel Pressure Injection Pipe Line A6290700200

Mercedes X164 OM629 Fuel Injector Line is a precise component of the diesel engine's fuel supply system, designed for installation on the left side of the power unit. Its original origin from the Mercedes brand ensures proper geometric fit, stable injection pressure, and safe cooperation with other components of the Diesel fuel system.

Specifications and technical data

• SKU: A6290700200
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6290700200
• Substitutable numbers: A6290700200, A 629 070 02 00
• Location on the vehicle: Left
• Fuel type: Diesel
• Category: Fuel Pumps & Sending Units

Purpose and Function in the Fuel System

The fuel injector line in the OM629 diesel engine is responsible for precisely delivering fuel under high pressure to the injector, without pressure loss and uncontrolled hydraulic vibrations. Its placement on the left side of the power unit means the component is matched to the specific cylinder and manifold geometry, minimizing stress during engine operation.

Thanks to its construction compliant with Common Rail system requirements, the line maintains stable flow parameters, which translates to:

• uniform fuel delivery to the cylinder,
• proper operation of the diesel engine,
• reduced risk of leaks and pressure drops,
• safe cooperation with the high-pressure pump and injector.

Compatibility with OM629 Engine and Mercedes X164 Vehicles

The offered line has been designed to work with the OM629 power unit used in X164 series models, ensuring proper line routing, correct length, and arc shape. Using an original component from the Fuel Pumps and Level Sensors group reduces the risk of installation problems, collisions with other components, and incorrect line positioning in the engine bay.

Selecting parts according to the manufacturer's designations allows for maintaining the factory parameters of the fuel system's operation, and also facilitates diagnostics and potential future service.

Technical Characteristics and Installation

The fuel injector line for diesel engines is made from materials resistant to high operating pressures and variable temperatures in the engine bay. Precisely shaped connection ends ensure a sealed connection with the high-pressure rail and the injector, which is crucial for maintaining correct injection pressure.

Its placement on the left side of the vehicle means that during installation, attention should be paid to:

• proper routing of the line in the factory brackets,
• no contact with hot components (manifold, turbocharger),
• tightening of the connectors according to the service procedure,
• leak check after the first engine start.

Condition, Origin, and Benefits of Using a Used Part

The component comes from an original Mercedes fuel system and is offered as a used part, allowing for economical repair while maintaining factory specifications. Using an original injector line instead of an aftermarket alternative reduces the risk of poor fit, incorrect bending radius, or problems with sealing connections.

For high-pressure Diesel systems, it is particularly important that injector lines comply with the manufacturer's design – this affects the durability of the pump, injectors, and the stability of the entire fuel supply system.

Technical Support and Selection of Fuel System Components

If you are planning comprehensive service for the fuel supply system in your Mercedes diesel vehicle and want to better understand the relationships between lines, pump, and injectors, it is worth consulting specialized materials. Practical information on diagnostics, repair, and component selection by OEM numbers can be found in the article Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair.

If you need other fuel supply system components for your vehicle of this brand, such as additional lines, supply elements, or components cooperating with the high-pressure rail, check the available parts in the Mercedes Fuel Pumps and Level Sensors category.