Mercedes W221 M157 Rear Tension Strut Control Arm Right O/S A2213501606

Mercedes W221 M157 Rear Tension Strut Control Arm Right O/S is a precision suspension component designed for the rear axle on the right side of gasoline-powered vehicles. It is responsible for stable wheel guidance, maintaining correct geometry, and reliably transferring loads while driving. Thanks to its original Mercedes manufacturing, it maintains the proper operating parameters and fitment for the W221 suspension design with the M157 engine.

Specifications and technical data

• SKU: A2213501606
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2213501606
• Substitutable numbers: A2213501606, A 221 350 16 06
• Location on the vehicle: Rear, Right
• Fuel type: Petrol
• Category: Control Arms, Ball Joints & Assemblies

Function of the tension strut in the rear axle suspension

The rear right tension strut in a Mercedes W221 with a gasoline engine operates within the rear suspension area, stabilizing the position of the wheel hub relative to the body. It is responsible for maintaining correct wheel alignment angles during acceleration, braking, and driving over uneven surfaces. A properly selected component limits unwanted movement, which translates into predictable vehicle behavior and better control of the driving path.

In combination with other control arms and ball joints, it forms a cohesive wheel guidance system, reducing excessive play and improving stability at higher speeds. This is particularly important in high-performance engine versions, such as the M157, where the suspension operates under increased dynamic loads.

Compatibility and fitment for Mercedes W221 M157

The offered tension strut has been designed specifically for the rear right side of Mercedes W221 models with a gasoline unit, which ensures correct operating geometry and compatibility with factory mounting points. As a result, installation is straightforward, without the need for modifications to the suspension structure.

The component belongs to the Control arms and ball joints group, meaning it works with other wheel guidance components, such as other transverse and longitudinal control arms or ball joints. Using a part from the same design family makes it easier to maintain consistent suspension characteristics and correct wheel alignment after replacement.

Performance characteristics and benefits of use

Replacing a worn tension strut with a functional part helps reduce unwanted knocking, improve steering precision, and increase the predictability of the rear axle's response. This has a direct impact on driving comfort, especially during dynamic acceleration and rapid load changes, where the rear suspension operates across a wide range of travel.

Key benefits of using the correct control arm in a Mercedes W221 M157 include:

• more stable rear axle handling at higher speeds,
• better maintenance of wheel geometry during braking and acceleration,
• reduced risk of uneven tire wear,
• more consistent operation of the entire suspension system in gasoline-powered vehicles.

The product is offered in used condition, which allows for an economical repair while maintaining the original design and suspension operating characteristics.

Professional selection and operation of control arms

To maximize the potential of the rear suspension in a Mercedes W221, it is worth paying attention to the correct selection of components according to the OEM number and placement on the vehicle. Consistency of components within one axle limits differences in stiffness and operating characteristics, which translates into more harmonious vehicle behavior on the road.

For drivers who want to better understand the role of control arms in the entire suspension system and the principles of their diagnostics, the following guide will be helpful: Suspension system – a comprehensive guide to shock absorbers, control arms, and stabilizers. The article explains how the wear of individual components manifests itself and when it is worth planning their replacement.

Expanding repairs within the rear suspension

If you are planning a comprehensive repair or upgrade of the suspension area in your Mercedes and need other components from the same group, such as additional control arms, ball joints, or rear axle guidance elements, check the available parts in the Mercedes control arms and ball joints category.