The Mercedes W221 Cradle Beam Subframe Rear is a structural component of the rear body, classified under longitudinal body frame parts and brackets. It is responsible for stable support of the rear suspension, proper load transfer, and maintaining axle geometry in high-class Mercedes W221 sedans.
Specifications and technical data
- SKU: A2213500408-1
- Mark: Mercedes (Genuine OE)
- Condition: Used
- OEM Part Number: A2213500408
- Substitutable numbers: A2213500408, A 221 350 04 08
- Location on the vehicle: Rear
- Category: Frame Rails & Subframes
Purpose and Function in the Vehicle
The described rear cradle is mounted in the rear of the vehicle, where it serves as a load-bearing element for suspension components and partially for the drivetrain. Its tasks include:
- maintaining stable rear axle geometry during driving under various load conditions,
- transferring forces from the suspension to the body in a controlled and predictable manner,
- increasing the structural rigidity of the rear body, which affects handling and comfort,
- providing proper mounting points for control arms, shock absorbers, and other chassis components.
Thanks to its carefully designed geometry, the cradle helps maintain stable vehicle behavior during braking, acceleration, and cornering, which is particularly important in heavier, comfort-oriented S-Class sedans.
Construction and Role in the Load-Bearing System
The rear beam in the W221 model belongs to the group of longitudinal body frame parts and brackets, meaning it forms part of the vehicle's load-bearing skeleton. Structurally, it is a rigid, multi-point bracket that:
- integrates suspension mounts into a single, cohesive element,
- distributes dynamic loads from the wheels to the body structure,
- minimizes local stresses in the body, extending its durability,
- facilitates servicing and replacement of suspension components through defined mounting points.
This structural solution allows for maintaining precise rear axle control and limiting unwanted movement of suspension components, which translates into predictable car reactions.
Application of Used Parts
The offered cradle is a used part, representing a reasonable compromise between cost and functionality, especially for structural repairs. Choosing a used rear bracket allows for:
- reducing repair costs compared to a brand-new part,
- preserving the original structural characteristics specific to the model,
- maintaining correct suspension geometry after repair, with proper installation and alignment.
Before installation, a standard workshop inspection is recommended, along with the replacement of any worn suspension components if their condition requires it, to fully utilize the cradle's structural potential.
Selection and Compatibility
To ensure correct fitment for a specific Mercedes W221 version, it is crucial to verify the part number and any interchangeable numbers in the product's technical specifications. This helps avoid installation issues and ensures full compliance with the vehicle's factory documentation.
If you have doubts about selection, consulting a mechanic or suspension specialist is recommended. They can assess structural compatibility and indicate whether the cradle is suitable for the specific engine and drivetrain version.
Other Longitudinal Body Frame Parts and Brackets for Mercedes
If you are also looking for other longitudinal body frame parts and brackets for Mercedes, check out the available products in the longitudinal body frame parts and brackets Mercedes category to find a complete structural solution for your car.
Technical Support and Operational Knowledge
When planning repairs to the rear suspension, it is advisable to familiarize yourself with practical tips on servicing and operation. The article TOP 10 Most Frequently Replaced Parts in Your Car may be helpful, offering guidance on how to plan replacements rationally and maintain your car without unnecessary costs.
If you are interested in a broader perspective on selecting suspension components and the differences between standard and sports solutions, it is also worth reading the material Standard vs. Sports Suspension – Construction Differences and Is It Worth Buying Used Suspension Parts?, which helps make informed purchasing decisions regarding the chassis system.
