Mercedes-Benz E W207 W212 Steering Column Cluster Indicator Wiper Stalks Squib

Mercedes-Benz E W207 W212 Steering Column Cluster Indicator Wiper Stalks Squib is an original control system component, including the turn signal and wiper stalks, as well as the airbag clock spring assembly. Designed specifically for E-Class models, it ensures precise control of body functions from the steering wheel and maintains full integration with the vehicle's factory electronics. This solution is dedicated to professional repair or replacement of control elements within the steering column.

Specifications and technical data

• SKU: A2129002320
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2129002320
• Substitutable numbers: A2129002320, A 212 900 23 20, A2129001628, A 212 900 16 28, BG
• Location on the vehicle: Front, Left
• Category: Steering Columns

Purpose and function in the steering system

The described stalk assembly is a component mounted in the front left interior section, directly on the steering column. It is responsible for handling key functions such as turn signaling, wiper control, and transmitting signals from the steering wheel to the airbag system via an integrated clock spring (the so-called squib). Thanks to its factory design, proper communication with the vehicle's control modules and correct positioning relative to the steering wheel are maintained.

Construction of the stalk assembly and integration with the steering column

The set includes a cluster of switches mounted around the steering column, integrated with a rotating signal ribbon module. This solution enables stable routing of signal wires between the stationary part of the column and the rotating steering wheel, which is essential for the proper operation of the airbag and steering wheel control buttons (if present in the vehicle's specific configuration). The design intended for the E-Class W207/W212 ensures proper geometric fit to the column housing and the dashboard.

Benefits of using an original steering column cluster

Using an original steering column switch cluster allows for maintaining the consistency of all functions controlled by the stalks. The most important advantages include:

• Factory fitment to the steering column and interior covers, which facilitates installation and eliminates issues with play or improper stalk positioning.
• Full integration with the vehicle's electrical system, including modules responsible for lighting, wipers, and safety systems.
• Stable signal routing within the airbag clock spring, which is crucial for the correct operation of the SRS system.
• The ability to restore the original ergonomics of turn signal and wiper operation after damage or wear of the previous component.

Condition, verification, and service application

This item belongs to the Steering Columns category and is intended for use as a replacement part in Mercedes vehicles. As a used component, it provides an economical solution while maintaining factory design and compatibility with the steering system. Before installation, it is recommended to perform a standard check of the switch functions and the free rotation of the signal ribbon, in accordance with service procedures for the given E-Class generation.

If you are planning a comprehensive repair or upgrade of the steering system area in your Mercedes and need other elements from the same group, such as column housings, additional control modules, or other stalk assemblies, check the available parts in the Mercedes Steering Columns category.

Technical support and service knowledge

To better understand the role of such components in the vehicle and the relationships between the steering column, power steering, and electronics, it is worth reading our guide: Steering system and power steering – how it works and what fails?. There, you will find practical information regarding diagnostics, symptoms of failures, and examples of using used steering system components.

If you are considering a wider replacement of components as part of a repair project or modification, our guide on selecting used parts may also be helpful: Buying used car parts – common mistakes when choosing components for tuning, which allows you to plan your purchases consciously and avoid typical problems associated with installing used subassemblies.