Mercedes W211 Steering Wheel Angle Sensor Slip Ring Squib Unit A0305459632

Mercedes W211 Steering Wheel Angle Sensor Slip Ring Squib Unit is a specialized component from the Switches, control elements and ignition locks group, responsible for a secure electrical connection between the airbag and the vehicle's wiring system. It enables stable signal transmission during steering wheel rotation, which is crucial for the proper operation of the passive safety system.

Specifications and technical data

• SKU: A0305459632
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0305459632
• Substitutable numbers: A0305459632, A 030 545 96 32
• Category: Switches & Controls

Function and application of the airbag slip ring

The airbag slip ring in Mercedes A-Class W168 and E-Class W210 models is responsible for maintaining the continuity of electrical circuits within the steering column. This component operates dynamically – as the steering wheel is turned, the flexible ribbon inside the housing winds and unwinds, maintaining an uninterrupted connection with the airbag module and other signals routed through the switch assembly.

Thanks to its precise design, the ribbon minimizes the risk of circuit interruptions, which is essential for the correct deployment of the airbag in the event of a collision. A properly selected component allows for maintaining the factory logic of the steering wheel control system without the need for installation modifications.

Benefits of using an original Mercedes component

Choosing a slip ring dedicated to specific Mercedes generations translates into a number of practical advantages:

• Factory compatibility with the steering column and switch assembly in Mercedes W168 and W210 vehicles.
• Proper fit of connectors and housing geometry, which facilitates installation and reduces the risk of installation errors.
• Stable signal routing to the airbag and other steering wheel control functions.
• Ability to restore the proper operation of the safety system after replacing a damaged slip ring.

Due to the nature of its operation in a moving part of the steering system, using a component with factory-compliant parameters is particularly important for the durability and reliability of the entire assembly.

Product characteristics and condition

The offered airbag slip ring is a component from the Switches, control elements and ignition locks group, intended for installation in Mercedes vehicles. The product is in used condition, meaning it has been removed from a vehicle, and its design retains the features of the original vehicle equipment. This type of solution allows for economical repair while maintaining compliance with the factory steering system architecture.

Before installation, it is recommended to verify compatibility with the specific vehicle equipment version and to check the correct alignment of the slip ring relative to the steering wheel position to avoid excessive tension during full wheel turns.

Installation and good service practices

When replacing the slip ring in a Mercedes W168 or W210, it is worth following a few service rules:

• Disconnect the vehicle's power supply before starting work on the airbag system.
• Remove the steering wheel and switch assembly according to the manufacturer's procedure, paying attention to the neutral position.
• Set the slip ring to the center position before installation to ensure an even range of rotation to the left and right.
• After completing the installation, perform a signal operation check and verify that no airbag-related error messages appear on the instrument cluster.

This approach reduces the risk of re-damaging the slip ring and helps maintain stable operation of the steering wheel control system.

If you are planning a comprehensive repair or upgrade of the steering column area in your Mercedes and need other elements from the same group, such as combination switches, control elements, or ignition lock components, check the available parts in the Mercedes switches, control elements and ignition locks category.

Safety and selection of used components

When working with the airbag system, it is particularly important to follow safety procedures and make informed component choices. A used slip ring can be an effective solution, provided it comes from a reliable source and has been verified for mechanical damage and excessive wear.

If you want to expand your knowledge on the safe selection of used components in critical vehicle systems, the following article may be helpful: Second-hand braking system: how to safely choose discs, calipers, and ABS?, which discusses good practices when purchasing parts from the secondary market and can serve as a reference point when selecting other subassemblies as well.