Mercedes W221 Trunk Boot Centre Stiffener Support Mount A2216400319

The Mercedes W221 Trunk Lid Central Mounting Reinforcement is an original structural component designed for S-Class models of the W221 generation. This precisely engineered bracket provides stable support for the trunk lid, improves mounting rigidity, and helps maintain correct body geometry in the front area, working in conjunction with factory mounting points. By adhering to manufacturer specifications, it is a solution compatible with factory assembly, suitable for post-accident repairs and bodywork servicing.

Specifications and technical data

• SKU: A2216400319
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2216400319
• Substitutable numbers: A2216400319, A 221 640 03 19
• Location on the vehicle: Front
• Category: Other Interior Parts & Accessories

Purpose and Function of the Component

The described trunk lid central bracket has been developed specifically for the Mercedes W221 body, taking into account the characteristic front-end design of the vehicle. Its purpose is to:

• maintain the appropriate rigidity of the trunk lid mounting to the body structure,
• limit undesirable stresses in the mounting zone,
• ensure repeatable, predictable trunk lid closing,
• work in conjunction with factory hinges and the trunk lock.

By preserving the original geometry, this component allows for the restoration of correct body panel alignment after body repairs or replacement of damaged components.

Benefits of Using an Original Bracket

Using the factory trunk lid mounting reinforcement in a Mercedes W221 offers a range of practical service and user benefits:

• Full Dimensional Compatibility – the component is matched to factory mounting points, eliminating the need for modifications.
• Stable trunk lid guidance – reducing play and undesirable vibrations during driving.
• Support for proper operation of the trunk lock and actuators – reducing the risk of mechanism misalignment.
• Usable in post-accident repairs – restoring the original structural rigidity in the front area.

This solution is particularly useful in vehicles subjected to intensive use, where the body structure is exposed to long-term loads and temperature changes.

Mounting Characteristics and Condition

The bracket is a component removed from a vehicle, which allows for the preservation of original mounting specifications and compliance with factory Mercedes standards. Its placement in the front area of the body requires precise fitting to the existing supporting structure, making the choice of an original component beneficial for both body and mechanical workshops, as well as for owners who prioritize maintaining a design consistent with the manufacturer's project.

Before installation, standard verification of the mounting points on the vehicle and a check of the geometry of adjacent body elements are recommended to fully utilize the load-bearing properties of the bracket.

Application in a Broader Body Repair Context

When working on the front structure of a vehicle, such as collision repairs, replacement of load-bearing elements, or body panel alignment adjustments, selecting the right components is crucial for the durability of the entire repair. The original Mercedes W221 trunk lid mounting reinforcement helps maintain structural integrity with other body elements, leading to predictable vehicle behavior during operation.

If you are planning a comprehensive repair or upgrade of the body area in your Mercedes and require other parts from the same group, such as brackets, holders, or additional mountings, check the available parts in the Other Mercedes category.

Technical Support and Service Knowledge

Selecting appropriate body structural components is particularly important for vehicles with advanced engineering, such as the Mercedes S-Class. It is advisable to use reliable sources of technical knowledge and comparisons of solutions used by different manufacturers. To better understand the structural differences between standard and sport versions, as well as the impact of body and chassis components on vehicle characteristics, the article Audi RS vs. Other Models – What Lies Under the Hood and Chassis? may be helpful, discussing, among other things, the relationships between construction and driving properties.