Mercedes W211 C219 Wheel ABS Speed Sensor Rear Left Right N/O/S A2115403017

The Mercedes W211 C219 ABS Sensor Left Right Rear is an original brake system component designed for installation on the rear axle of Mercedes E-Class (W211) and CLS (C219) vehicles. Precise wheel speed reading ensures stable operation of the ABS and traction control systems, leading to safe braking and predictable vehicle behavior on the road. A used sensor is a sensible choice for drivers seeking a proven, factory-original solution at an attractive price.

Specifications and technical data

• SKU: A2115403017
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2115403017
• Substitutable numbers: A2115403017, A 211 540 30 17
• Location on the vehicle: Rear, Right, Left
• Category: ABS Speed Sensors

Vehicle Application and Placement

The presented sensor belongs to the category of ABS speed sensors and is designed for use on the rear axle of the vehicle, with the possibility of installation on both the left and right sides. This design simplifies part selection and allows for flexible replacement depending on service needs.

Its placement on the vehicle is engineered to work in conjunction with the wheel's pulse ring, providing the ABS control unit with accurate rotational speed information. Proper installation in the designated mounting point is crucial for maintaining the stability of the entire braking system.

Technical and Functional Characteristics

The ABS speed sensor in this model is responsible for:

• continuous measurement of rear axle wheel rotational speed,
• transmitting signals to the ABS control unit and related systems,
• cooperation with stability control and traction control systems,
• preventing wheel lock-up during braking.

Thanks to its factory fit for the W211/C219 platform, the sensor maintains correct electrical and geometric parameters, facilitating installation and reducing the risk of diagnostic errors. The appropriate design of the connector and signal cable ensures a secure connection to the vehicle's wiring harness.

Benefits of Using an Original Mercedes Sensor

Choosing an original Mercedes ABS speed sensor primarily offers:

• compatibility with the factory system – no need for wiring or mounting modifications,
• stable cooperation with the vehicle's electronics, without unwanted dashboard errors,
• adherence to the manufacturer's specified operating parameters for ABS and assistance systems,
• the ability to utilize existing mounting points and cable routing.

For drivetrain and braking systems, correct diagnostics and part selection are particularly important. If you want to better understand the relationships between sensors, the differential, and the rest of the drivetrain, check out our guide: Used Differentials – Practical Tips for Choosing Used Sensors and Drivetrain Components.

Condition, Verification, and Practical Application

The offered item is a used part, sourced from disassembly, allowing for a combination of reasonable cost with the preservation of factory specifications. Before being offered for sale, the sensor is verified for connector integrity, housing condition, and mounting capability, ensuring it can be used as a functional replacement in the vehicle.

Due to its function within the ABS system, installation is recommended in a workshop environment or by someone experienced with braking systems. Proper seating in the steering knuckle or hubs, correct cable routing, and thorough cleaning of the mounting socket directly impact signal stability and the longevity of the entire solution.

Why Choose This Sensor for Your Mercedes W211/C219

The Mercedes W211 C219 ABS Sensor Left Right Rear is a practical solution for users who want to restore full ABS system functionality without compromising the original design. Its precise fit for the specific model platform minimizes installation issues and helps maintain predictable vehicle behavior during braking and spirited driving.

If you are interested in the broader context of using used parts in automotive applications, including economic and operational benefits, it is also worth reading the material: Is it Worth Investing in Used Parts for Premium Cars. This will help you make a more informed decision when planning future repairs and upgrades for your car.