Mercedes W212 W219 Coil Spring Rear Axle Suspension Set A2123240404

Mercedes W212 W219 Rear Shock Absorber Spring Suspension Kit is an original suspension component from the Shock Absorber and Strut Mounts category, designed for installation on the rear axle. This used component ensures a factory fit, maintaining the correct suspension performance characteristics and vehicle handling stability. It's a solution for drivers who want to restore proper geometry and driving comfort without compromising on compatibility.

Specifications and technical data

• SKU: A2123240404
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2123240404
• Substitutable numbers: A2123240404, A 212 324 04 04, KZ
• Location on the vehicle: Rear
• Category: Shock & Strut Mounts

Purpose and Function in Rear Axle Suspension

The rear shock absorber spring in Mercedes E-Class and CLS models is responsible for maintaining the correct body height, transferring loads, and working with the shock absorber to dampen vibrations. This component operates in close proximity to the control arms and mounts, making its proper selection crucial for:

• vehicle stability when driving over uneven surfaces,
• even load distribution on the rear axle,
• reducing body roll during braking and cornering,
• maintaining correct suspension geometry and wheel grip.

By using an original spring from the same design group, the suspension system retains the parameters intended by the manufacturer, which is particularly important for premium vehicles.

Kit Construction and Mercedes Fitment

The Rear Suspension Shock Absorber Spring has been specifically designed to work with factory Mercedes mounts and struts. The appropriate shape of the coils and support points allows for correct seating in the body socket and on the shock absorber mount, without the need for modifications or adaptations.

Originality from the Mercedes brand means maintaining the correct stiffness, deflection characteristics, and compatibility with standard suspension components such as shock absorbers, bump stops, and rubber isolators. This is especially important when replacing a single component in an existing system, where parameter consistency is key.

Vehicle Placement and Installation Aspects

The presented kit is designed for installation on the vehicle's rear axle. In practice, this means it works with the rear shock absorbers and strut mounts, which transfer loads from the body to the wheels. The correct placement of the spring influences:

• the proper positioning of the body relative to the axle,
• even deflection on both sides of the vehicle,
• the operation of assistance systems (ABS, ESP) which rely on body stability.

When replacing, it is recommended to install as a pair on both sides of the rear axle to maintain suspension characteristic symmetry and avoid differences in deflection between the left and right sides.

Characteristics of the Used Component

The offered kit is a dismantled item and is classified as a used component, allowing for economical repair while maintaining original manufacturing quality. Such items are often chosen when compliance with factory specifications is desired, while also aiming to reduce service costs.

Thanks to its original construction, the used spring can still provide proper stiffness and work with the shock absorber, provided it is installed correctly and other suspension components, such as shock absorber and strut mounts, are inspected.

Application in Suspension Service and Diagnostics

The rear spring is often replaced in cases of:

• excessive lowering of one side of the vehicle,
• a broken coil or visible mechanical damage,
• uneven tire wear resulting from incorrect rear axle geometry,
• suspension upgrades after accident repairs.

Selecting the correct component according to manufacturer markings helps avoid compatibility issues and ensures predictable vehicle behavior on the road.

If you are planning comprehensive service for the rear suspension of your Mercedes and also need other components that work with rear springs and shock absorbers, check the available parts in the Mercedes Shock Absorber and Strut Mounts category.

If you are interested in a broader context of selecting original components by manufacturer markings and want to better understand how manufacturers design powertrains and their cooperating sub-assemblies, an article describing the legendary Audi five-cylinder engine and the practice of selecting OEM parts by numbers might be useful – you can find it here: Audi Five-Cylinder Engine – A Legend from Quattro to RS3 and How to Care for It with Original Audi Parts.