Door Seal Mercedes W212 Window Guide Rear Left N/S Sealing A2127351725

Mercedes W212 Rear Left Window Seal is a precisely fitted component from the Door Seals category, designed for the rear left side of the body. Its original design ensures proper window guidance and stable door sealing, contributing to acoustic comfort and protection of the vehicle's interior. A used component allows for an economical yet technically correct repair of the factory sealing system in a Mercedes E-Class W212.

Specifications and technical data

• SKU: A2127351725
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2127351725
• Substitutable numbers: A2127351725, A 212 735 17 25, KZ
• Location on the vehicle: Rear, Left
• Category: Door Seals

Purpose and Body Fitment

The seal is specifically designed for installation on the rear left door, in the window guide area. It is responsible for creating a tight seal between the window edge and the door frame, limiting the ingress of water, dust, and noise into the cabin. Thanks to its factory profile and appropriate shape, the element maintains the correct body line geometry and requires no modifications during installation.

Technical and Functional Characteristics

The rear left window seal for the Mercedes W212 performs several key operational functions:

• stabilizes the window in its guide during raising and lowering,
• creates a flexible barrier between the window and the door frame,
• reduces wind noise at higher speeds,
• supports protection against moisture in the door upholstery area.

The appropriately selected hardness of the compound and the working profile of the seal help maintain proper window pressure against the frame, which promotes smooth operation of the lifting mechanism and reduces the risk of unwanted vibrations.

Benefits of Using an Original Mercedes Seal

Using an original seal from the Door Seals category in a Mercedes W212 allows for the preservation of factory sealing and acoustic parameters. Compared to aftermarket alternatives, an OEM part ensures:

• precise fit to the shape of the door frame and window,
• consistency with other body seals,
• a lower risk of squeaking and abrasion in the contact area with the window.

This provides the driver and passengers with stable vehicle usage conditions, and the door system remains compliant with the manufacturer's specifications regarding comfort and durability.

Component Condition and Service Application

The offered seal is a used component, allowing for a cost-effective restoration of the vehicle's sealing system. This type of component is particularly useful for:

• repairs after window or door removal,
• addressing leaks around the rear left window,
• servicing fleet vehicles where cost optimization of parts is crucial.

The manufacturer's markings and compliance with factory reference numbers facilitate the selection of the correct part, minimizing the risk of ordering errors.

Mercedes Door Seals – Selection and Configuration Expansion

If you also need other Mercedes door seals for your vehicle, check out the Mercedes door seals available in our store to complete a full set of body elements for your chosen model.

More About Using Used Body Parts

Want to better understand how to consciously choose used components – including door seals and other body parts – in terms of durability and cost-effectiveness? Read the article Best Used Parts for Your Car's Tuning, where you'll find practical tips on selecting reliable parts from the secondary market.