Mercedes W639 Tailgate Hinge Lower Left N/S Trunk Brilliant Silver A6397400137

Mercedes W639 Tailgate Hinge Lower Left N/S Trunk Brilliant Silver is an original body component from the Tailgates and rear parts category, designed for precise guidance and support of the tailgate in Mercedes W639 series models. The used hinge ensures factory mounting geometry, which facilitates maintaining the correct body line and sealing of the rear part of the vehicle. Thanks to the factory-compliant Brilliant Silver Metallic finish, the component integrates well with the original body paint.

Specifications and technical data

• SKU: A6397400137-BRS
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6397400137
• Substitutable numbers: A6397400137, A 639 740 01 37, KD
• Location on the vehicle: Left
• Color: Brilliant Silver Metallic - 9744
• Category: Boot & Hatch Lids

Purpose and function of the tailgate hinge

The left tailgate hinge in the Mercedes W639 is responsible for stable guidance and controlled opening and closing movement of the tailgate. A properly selected component:

• maintains the correct position of the tailgate relative to the body,
• reduces stress on sheet metal and seals,
• minimizes the risk of the tailgate edge rubbing against the bodywork,
• supports the even operation of gas struts.

The placement on the left side of the vehicle allows for direct replacement of a damaged or worn component without interfering with the right side of the tailgate suspension.

Color and body fitment

The hinge is finished in the Brilliant Silver Metallic shade, which facilitates aesthetic matching to bodywork in the same color or related paint configurations. In practice, this means:

• a consistent look of the rear zone without visible color differences,
• reducing the need for additional painting during replacement,
• easier maintenance of the vehicle's uniform aesthetics after repair.

For users who care about visual consistency of the bodywork, this is a practical service solution, especially for post-accident repairs or after corrosion in the tailgate mounting area.

Characteristics of the used component

As a used component, the tailgate hinge retains the original design and mounting parameters provided by the manufacturer. Compared to aftermarket replacements, this allows for:

• better fitment with factory mounting points,
• preservation of the tailgate opening kinematics intended by the manufacturer,
• reduction of the need for additional adjustments during installation.

Choosing a used hinge is often a beneficial compromise between repair cost and maintaining original build quality and fitment.

Mounting zone and service application

The placement on the left side of the vehicle facilitates the identification of the correct component during rear bodywork repairs. The hinge will work well both for replacement after mechanical damage and for gradual wear and tear, manifesting as tailgate sagging, difficulties with closing, or uneven gaps between the tailgate and fenders.

If you are planning a comprehensive repair or modernization of the rear body zone in your Mercedes and need other components from the same group, such as additional hinges, mounts, or tailgate supports, check the available parts in the Mercedes Tailgates and rear parts category.

Selection support and technical knowledge

When selecting body components, just as with mechanical sub-assemblies, it is crucial to use reliable manufacturer markings and catalog data. It is worth relying on proven identification procedures based on factory markings to avoid problems with installation and body geometry. If you are interested in a broader context of using used parts, selection procedures, and repair cost optimization, check out the guide Why it is worth buying used gearboxes and engines – facts instead of myths, which discusses a practical approach to components from the secondary market.