Mercedes W212 S212 C218 Spare Tyre Housing Foam Ring A2126840737

Mercedes W212 S212 C218 Spare Tyre Housing Foam Ring is a precisely fitted component from the Rims category, designed to ensure stable seating of the spare wheel in the trunk. The design of this component supports the correct positioning of the rim, limits its movement, and helps protect the surrounding area from unwanted vibrations while driving.

Specifications and technical data

• SKU: A2126840737
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2126840737
• Substitutable numbers: A2126840737, A 212 684 07 37
• Rim diameter: 19"
• Rim width: 4.5
• Offset (ET): 40
• Hole diameter: 112
• Number of holes: 5
• Rim material: Steel
• Category: Rims

Purpose and function of the component

The foam spare tyre housing ring dedicated to Mercedes E-Class and CLS models ensures proper support for the rim in the luggage compartment. Thanks to its tailored geometry, it works with the steel rim, stabilizing its position and reducing the risk of play that could cause noise or unwanted stress on other trunk equipment components.

This element is particularly useful in vehicles where the spare wheel has a larger diameter and requires proper centering support. A correctly selected foam ring also facilitates quick installation and removal of the spare wheel, as the rim is always placed in the same, manufacturer-intended location.

Rim parameters and ring fitment

The presented ring has been prepared to work with a steel rim of a specific diameter, width, offset, and number of mounting holes. This combination of rim parameters allows for secure seating of the wheel in the trunk well, with the foam element acting as a spacer and stabilizer that conforms to the shape of the rim.

Thanks to this solution, the spare wheel remains properly immobilized, which is important both for acoustic comfort inside the vehicle and for the safety of items transported in the trunk. The steel rim construction combined with the foam ring creates a cohesive system that withstands typical operational loads.

Application in Mercedes vehicles

The discussed component is intended for Mercedes vehicles equipped with a spare wheel mounted on a steel rim with specific parameters. Such a solution is often used in higher-class models, where attention to operational refinement and the reduction of cabin vibrations is significant for user comfort.

Using a dedicated foam ring instead of random shims or fillers allows for maintaining the manufacturer's original design concept. This, in turn, translates into predictable vehicle behavior, easier service, and the consistency of the entire spare wheel mounting system.

Operational characteristics and installation

As an element from the Rims category, the foam ring works directly with the wheel rim, which is why its shape and dimensions are adapted to specific rim parameters. Installation involves properly placing the ring in the designated area of the trunk and then seating the spare wheel on it – without the need for additional adapters.

This solution is practical in daily use: the wheel remains stable, and access to it in case of a breakdown is quick and intuitive. The used condition of the part allows for combining functionality with a more favorable purchase cost, while maintaining the original geometry and purpose of the element.

Technical support and knowledge development

If you want to better understand how to select and operate rims in your car, it is worth checking out practical guide materials. You will find a lot of useful information about selecting and refurbishing rims in the article Used rims like new: a guide to buying and refurbishing alloy wheels, which helps in making informed service and purchasing decisions.

If you are planning a comprehensive repair or upgrade of the wheel and tire area in your Mercedes and need other components from the same group, such as rims, centering rings, or mounting accessories, check out the available parts in the Mercedes Rims category.