Mercedes A-Class W168 Rear Left Door N/S Window Guide Seal Gasket A1687351325

Mercedes A-Class W168 Rear Left Door N/S Window Guide Seal Gasket is a precision-fitted body component designed for the rear left door window of the A-Class model. It is responsible for guiding the window securely, reducing noise, and protecting the interior from water and debris, while ensuring the stable operation of the lifting mechanism. Thanks to the use of original geometry, the seal works in harmony with the factory door construction, which translates into secure mounting and proper sealing of the window area.

Specifications and technical data

• SKU: A1687351325
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1687351325
• Substitutable numbers: A1687351325, A 168 735 13 25, EM
• Location on the vehicle: Rear, Left
• Category: Doors & Door Skins

Purpose and function in the bodywork

The seal is a component from the Doors and door panels group, dedicated to the rear left part of the body. Its tasks include:

• guiding the window in the correct track during raising and lowering,
• limiting water penetration into the door interior and cabin,
• reducing wind noise at higher speeds,
• stabilizing the window edge relative to the door frame.

Thanks to its proper profile, the seal works with the door frame and the window, which helps maintain acoustic comfort and the correct operation of the lifting mechanism.

Compatibility and fit for Mercedes W168

The element has been designed specifically for the rear left door construction in the Mercedes A-Class W168 generation. This means that:

• the shape and length of the seal are adapted to the factory contour of the door frame,
• the mounting points and seating method correspond to the manufacturer's original solutions,
• there is no need to modify the door panel or the window during installation.

Such a fit helps maintain the structural integrity of the body and minimizes the risk of leaks in the rear window area on the driver's side.

Characteristics of the used element

The seal comes from dismantling, which allows for maintaining the original material specifications typical of the Mercedes brand. The used element:

• retains the factory geometry adapted to the specific model,
• enables economical repair of the door area without resorting to unverified replacements,
• is a good solution when restoring tightness after a collision or window replacement.

Choosing such a component is particularly beneficial when servicing older vehicles, where both proper fit and rational repair costs are important.

Benefits of using a dedicated window seal

Using the correct seal in the rear left part of the body affects several important areas of vehicle operation:

• Acoustic comfort – reduction of wind noise and window vibrations.
• Interior protection – reducing the risk of water ingress into the upholstery and luggage space.
• Durability of the window mechanism – stable guidance reduces loads on the guides and the regulator.
• Aesthetics of the door edge – maintaining even gaps and a consistent contact line between the window and the frame.

This is especially important in vehicles used daily, where repetitive window opening and closing cycles require properly selected sealing elements.

Door area expansion and further service

If you are planning a comprehensive repair or modernization of the door area in your Mercedes and need other elements from the same group, such as panels, frames, or additional reinforcements, check the available parts in the Mercedes Doors and door panels category.

For users interested in a broader approach to servicing premium vehicles, including cost optimization while maintaining high quality, the article describing the use of original components from dismantling may be helpful – Luxury within reach – how to service a legendary Porsche brand using proven used parts.