Mercedes W177 Saloon Spring Trunk Lid Boot Tension Left Right N/O/S A1777572500

Mercedes W177 Saloon Spring Trunk Lid Boot Tension Left Right N/O/S is an original component from the Trunk lids and rear group, designed to work on both the left and right sides of the lid. It provides controlled, stable support for the lid, which translates into convenient opening and safe holding in the desired position.

Specifications and technical data

• SKU: A1777572500
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1777572500
• Substitutable numbers: A1777572500, A 177 757 25 00, KD
• Location on the vehicle: Right, Left
• Category: Boot & Hatch Lids

Purpose and function in the bodywork

The presented trunk spring is dedicated to the Mercedes W177 saloon and works with the factory rear lid hinge mechanism. It is responsible for assisting the lid movement and evenly distributing loads on the right and left sides, which reduces stress on the hinges and body mounts.

This element stabilizes the operation of the lid during opening and closing, reduces the risk of sudden dropping, and improves the comfort of daily vehicle use, especially when using the luggage compartment frequently.

Construction and fitment for Mercedes W177

The spring has been designed as an OEM part for a specific generation of Mercedes, thanks to which it maintains the correct force and stroke characteristics. Proper fitment to the geometry of the trunk lid hinges allows for:

• correct guidance of the lid movement in the full range of opening,
• maintaining the lid lift height intended by the manufacturer,
• reducing play and unwanted vibrations in the rear part of the bodywork.

The placement on both sides of the vehicle allows the spring to be used as a replacement for both the left and right sides, in accordance with the factory configuration.

Condition, origin, and advantages of the used OEM part

The offered element is an original Mercedes part in used condition, coming from disassembly. Such components retain factory operating parameters while allowing for reduced service costs compared to new elements.

In the case of trunk lid springs, it is particularly important to maintain the correct force characteristics – original solutions are designed for a specific body model, which minimizes the risk of improper closing or too sudden opening of the lid.

If you want to better understand why a branded part from disassembly is often a more favorable choice than a cheap replacement, check out the article 5 reasons why a used OEM part is a better choice than a replacement.

Service application and benefits of replacement

Replacing the trunk lid spring is recommended when symptoms appear such as:

• the lid dropping automatically in the wind or on sloping ground,
• noticeable weakening of the assist when lifting the lid,
• uneven operation on the left and right sides of the trunk.

Using an original spring in the Mercedes W177 restores the operating characteristics of the mechanism intended by the manufacturer, improves the ergonomics of using the trunk, and increases the safety of people using the cargo space.

Expansion of rear bodywork modernization

If you are planning a comprehensive repair or modernization of the rear body zone in your Mercedes and need other elements from the same group, such as hinges, mounts, or additional lid supports, check the available parts in the Mercedes Trunk lids and rear category.