Mercedes H243 Door Seal Rear Left N/S Sealing Gasket Rubber A2477354300

Mercedes H243 Door Seal Rear Left N/S Sealing Gasket Rubber is a precision-fitted body component designed for the rear left door window of Mercedes vehicles. It is responsible for the tight seating of the glass within the door frame, reducing noise, and protecting the interior from moisture and contaminants, while ensuring the smooth operation of the window lifting mechanism.

Specifications and technical data

• SKU: A2477354300
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2477354300
• Substitutable numbers: A2477354300, A 247 735 43 00
• Location on the vehicle: Rear, Left
• Category: Door Seals

Purpose and function of the window frame seal

The rear left door window frame seal for the H243 version has been specifically designed for installation in the rear section of the body on the driver's side. Its task is to maintain the proper pressure of the glass against the door frame, which results in:

• reducing air drafts at higher speeds,
• reducing wind noise in the passenger cabin,
• protecting against the ingress of water and fine contaminants into the door interior,
• stable guidance of the glass in the tracks during raising and lowering.

Thanks to a design consistent with factory standards, Door seals of this series ensure a proper fit with the bodywork and glass, without the need for modifications or forced adjustments.

Construction, fitment, and installation

The window frame seal in the H243 version is a component profiled for the specific geometry of the rear left door. The cross-sectional shape and bending line are adapted to the factory door frame, which facilitates installation and reduces the risk of leaks resulting from improper positioning.

This solution allows for:

• installation in place of the original seal without interfering with the door structure,
• maintaining proper adhesion of the glass along the entire perimeter,
• maintaining the correct operation of the window lifting mechanism without additional resistance.

The component is intended for installation in the rear part of the vehicle on the left side, which eliminates the risk of error when selecting based on the side of the body. Precise fitment to the specific location on the vehicle is crucial for the tightness and durability of the entire glass-to-frame connection.

Performance characteristics and benefits of use

A properly selected window frame seal affects not only acoustic comfort but also the protection of internal door components. Limiting water ingress into the structure reduces the risk of corrosion, damage to electrical harnesses, and accelerated wear of the window lifting mechanism.

Using the original design dedicated to H243 models allows for:

• a visually consistent window outline relative to the body line,
• stable glass guidance throughout its entire range of motion,
• more comfortable acoustic conditions in the rear part of the cabin,
• preservation of the factory character of the door finish.

This solution is particularly important for post-collision repairs, glass replacement, or door renovation, where restoring the original tightness and comfort parameters is required.

Condition of the component and service application

The offered rear left door window frame seal is an aftermarket component, which allows for economical repair while maintaining a design consistent with the factory solution. This type of component will work well both when replacing a worn, brittle seal and when completing a door after bodywork repairs.

In workshop practice, it is often necessary to replace the seal when:

• noticeable noise appears in the area of the rear window while driving,
• there are visible water leaks in the area of the upper or side edge of the glass,
• there are problems with the smooth closing of the window in the rear doors.

A well-selected window frame seal allows for restoring the correct operating parameters of the door without the need to interfere with other structural elements.

Related components and expansion of the door system

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 perimeter seals, window trim strips, or edge seals, check out the available parts in the Mercedes door seals category.

For extensive service work within the electrical system or drive equipment in the vehicle, guide materials regarding the selection of aftermarket components may also be helpful, such as the article When is it worth replacing an alternator with a used one: a practical guide for drivers, which discusses the practical aspects of using used sub-assemblies in daily operation.