Mercedes W164 Door Seal Gasket Front Left Right N/O/S Black A1647201278

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes W164 Door Seal Gasket Front Left Right is a precisely fitted body component designed for installation on the front driver and passenger side doors. It maintains a seal between the door and the body, improving acoustic comfort, moisture protection, and the stability of the door locks. Thanks to its factory geometry, it ensures proper door fitment without the need for modifications.

Specifications and technical data

• SKU: A1647201278
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1647201278
• Substitutable numbers: A1647201278, A 164 720 12 78
• Location on the vehicle: Front, Left, Right
• Part type: Door Seal
• Color: Black
• Category: Door Seals

Purpose and function of the door seal

The seal is designed for the front door area in Mercedes W164 family models, covering both the left and right sides. The component operates in the critical contact area between the door and the body, where it is responsible for:

• limiting the ingress of water and contaminants into the interior,
• reducing wind noise at higher speeds,
• stable guidance of the door edge during closing,
• protecting the paint edge from friction.

Thanks to its proper profile, the seal supports the maintenance of the factory door geometry, which is important for both driving comfort and the durability of lock and hinge components.

Construction, color, and body fitment

The seal is made in a uniform black color, which harmoniously blends with the factory sill and pillar finishes in the Mercedes. The neutral color facilitates aesthetic matching regardless of the body paint color, and the flexible material structure allows for proper placement in the corners and curves of the door.

The seal profile has been designed for the specific W164 body, which translates into:

• consistent adhesion along the entire door perimeter,
• no need for cutting or heat forming,
• maintaining proper pressure after the door is closed.

Vehicle placement and installation aspects

The component is intended for installation in the front part of the vehicle, on the left and right doors. This solution allows for a consistent refresh of the entire front door area, which is particularly important when existing seals show wear on both sides.

With proper installation, you can achieve:

• more even door closing,
• reduction of rattles and resonances originating from the seal area,
• better cabin insulation from external conditions.

The seal belongs to the Door seals group, which facilitates identification when planning bodywork service tasks.

Condition of the component and service application

The offered seal is in used condition, making it a reasonable choice for maintenance repairs where the priority is functionally restoring the seal on a reasonable budget. This type of component works well for:

• replacing a damaged or torn seal after a collision or bodywork intervention,
• reducing cabin noise after years of vehicle operation,
• replacing a missing section of the seal after improper door disassembly.

Support with selection and expansion of service work

If you are planning a comprehensive repair or upgrade of the door area in your Mercedes and need other elements from the same group, such as additional edge seals, sill seals, or pillar seals, check the available parts in the Mercedes door seals category.

For larger service tasks on vehicles of this brand, including the drivetrain, technical material describing the characteristics of diesel units may be helpful – more information can be found in the article The second life of the Mercedes OM642 engine – how injectors and a turbocharger restore the power of the 3.0 V6 CDI, which organizes knowledge about typical faults and the plan for refreshing this engine.