Mercedes W166 Door Seal Edge Gasket Front Left N/S Rubber Sealing A1667252300

The Mercedes W166 Front Left Door Seal is an original body part from the Door Seals group, designed for installation on the driver's side at the front of the vehicle. It ensures a tight door closure, reduces aerodynamic noise, and improves acoustic and thermal comfort inside the car. Thanks to its factory fit, it is a practical solution for collision repairs, replacing worn seals, or renovation work.

Specifications and technical data

• SKU: A1667252300
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1667252300
• Substitutable numbers: A1667252300, A 166 725 23 00
• Location on the vehicle: Front, Left
• Category: Door Seals

Purpose and Fitment

The seal is specifically designed for Mercedes W166 series models, intended for the front left side of the vehicle. The profile design is adapted to the shape of the door frame and adjacent body elements, allowing for secure fitting in the factory mounting points without modifications. This precise fit minimizes the risk of leaks, squeaks, or improper door closing.

Sealing Function and Interior Protection

This component plays a crucial role in separating the cabin from external factors. A properly selected door seal:

• reduces the ingress of water and moisture into the interior,
• minimizes noise from the surroundings and airflow,
• stabilizes the door wing's position relative to the body,
• reduces the risk of corrosion in the sill and pillar areas.

This improves overall driving comfort, as well as the durability of upholstery and electrical components in the door area.

Characteristics of an Original Mercedes Part

As a part from the manufacturer's line, the seal retains the correct shape, hardness, and material flexibility intended for this body construction. The appropriately selected profile cross-section ensures proper pressure against the door frame and even force distribution during closing. In practice, this means:

• stable adhesion around the entire perimeter,
• reduced load on hinges and the lock,
• less door slamming during daily use.

This solution is particularly beneficial for restoring the vehicle's original acoustic and functional parameters after years of use.

Condition, Application, and Installation

The offered seal is a used part, making it an attractive option for economical vehicle repair, especially if you want to retain original components. It is suitable for replacing a worn or damaged seal, as well as for repairs after door removal, bodywork, or painting in the front left part of the body.

Installation involves fitting the seal into the factory guides and recesses within the door frame and adjacent body elements. By following the correct procedure, it is possible to achieve even pressure around the entire perimeter, which translates to effective sealing and proper door closure.

Complementary Mercedes Door Seals and Used Parts Knowledge

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

When selecting parts from the secondary market, it is worth knowing the common pitfalls associated with purchasing body and equipment components. To better prepare for choosing the right parts and avoid the most frequent mistakes when assembling a repair or tuning kit, read the article Buying Used Car Parts • Common Mistakes When Choosing Tuning Parts.