Cruise Control Stalk Mercedes R170 W202 W210 Control Arm Switch A2105400845

Cruise Control Stalk Mercedes R170 W202 W210 Control Arm Switch is an original speed control system component for Mercedes vehicles, designed for installation on the steering column. It allows for convenient and precise management of the cruise control function without taking your hands off the steering wheel, improving driving comfort on long journeys. As part of the Switches, control elements and ignition locks group, it ensures consistent operation with the vehicle's factory electrical installation.

Specifications and technical data

• SKU: A2105400845
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2105400845
• Substitutable numbers: A2105400845, A 210 540 08 45
• Category: Switches & Controls

Purpose and function of the cruise control stalk

The presented cruise control stalk is a control element responsible for operating the speed maintenance function in selected Mercedes R, C, and E-Class models. Mounted on the steering column, it allows the driver to:

• activate and deactivate cruise control while driving,
• smoothly adjust the set speed,
• restore the last memorized speed value.

Thanks to its integration with the vehicle's factory electronic system, the stalk works with the control modules responsible for the drivetrain, which translates into stable cruise control operation and predictable response to switch movements.

Construction and integration with the control system

The cruise control stalk belongs to the Switches, control elements and ignition locks group, which means it is designed to work in the immediate vicinity of other steering column switches. The construction includes:

• an ergonomically shaped control arm, facilitating operation while wearing gloves and during highway driving,
• a set of contacts and electrical tracks adapted to the Mercedes installation,
• a return mechanism ensuring tactile operating positions of the switch.

Such a solution allows for maintaining a consistent interior look and proper fitment to the steering column covers, without the need to modify factory trim elements.

Benefits of using an original used part

Choosing an original, used cruise control stalk for a Mercedes is a reasonable compromise between cost and quality. A component sourced from dismantling:

• retains factory operating characteristics and compatibility with the electrical system,
• reduces the risk of communication issues in the vehicle's bus compared to low-quality replacements,
• allows for restoring full cruise control functionality without the need to invest in a new component.

For many Mercedes-Benz users, this is also a way to maintain the original vehicle specification, which is important both in terms of comfort and the future resale value of the car.

Practical application and assembly aspects

The cruise control stalk is mounted on the steering column in the place provided by the vehicle manufacturer. In practice, this means:

• the ability to use factory mounting points,
• connection to the existing wiring harness without the need for installation modifications,
• maintaining original operating ergonomics in combination with other steering wheel switches.

Before installation, it is worth verifying the compatibility of the vehicle's equipment version with the cruise control function and the fitment of the stalk to the specific steering column configuration to ensure proper cooperation with the control modules.

If you are planning a comprehensive repair or upgrade of the steering column control 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 Switches, control elements and ignition locks Mercedes category.

Technical support and selection of used Mercedes parts

When choosing used control elements for a Mercedes, it is worth paying attention to their origin and compatibility with the specific vehicle equipment version. It may be helpful to read the guide on selecting original parts from dismantling, which discusses, among other things, the advantages of using factory components in premium class cars. More information can be found in the article Used parts for Mercedes – original parts from dismantling.