Leveling Module Mercedes W164 R171 Headlight Level Sensor Unit A2118708726

The Mercedes W164 R171 Headlight Leveling Module is an original lighting system component designed for precise control of the headlight beam height. With its factory design for the Mercedes brand, it ensures proper integration with the vehicle's electrical system and stable operation of automatic headlight leveling. This is a solution for users who expect a reliable, technically matched component instead of universal replacements.

Specifications and technical data

• SKU: A2118708726
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2118708726
• Substitutable numbers: A2118708726, A 211 870 87 26
• Category: Headlight Assemblies

Module Purpose and Function

The Headlight Leveling Module is responsible for the electronic control of the vertical position of the headlights, based on signals from body and suspension sensors. A properly functioning module:

• maintains the correct light beam height when the vehicle's load changes,
• improves night driving comfort through stable road illumination,
• reduces the risk of dazzling oncoming drivers,
• works with the factory headlight system in Mercedes vehicles.

This ensures the lighting system maintains the parameters intended by the manufacturer, which is important for both safety and regulatory compliance.

Construction and Electrical System Integration

The presented module is part of the Headlights group, designed to work with the factory electrical system in Mercedes vehicles. The OEM design allows for:

• use of original electrical connectors without wiring modifications,
• proper communication with other vehicle control units,
• retention of factory diagnostic functions within the onboard system.

The precise fit for W164 and R171 platforms allows for consistency within the entire lighting system, without the need for additional adapters or installation modifications.

Product Condition and Service Application

The module comes from the category of used OEM parts, making it an attractive service solution for daily driven vehicles. This type of component is particularly useful when:

• the original headlight control unit has been damaged due to an electrical failure or water ingress,
• headlight leveling errors appear in the diagnostic system,
• the module needs replacement after accident repairs to the front of the vehicle.

Using an original module ensures operational parameter consistency with other lighting system components, which is crucial for long-term vehicle use.

Benefits of Choosing an Original Mercedes Module

By choosing this headlight leveling module, you gain:

• factory fitment for the electrical installation and architecture of Mercedes vehicles,
• consistent operation with the front headlight system,
• the ability to restore full automatic leveling functionality after a failure,
• a more cost-effective service solution than a new part from an authorized dealer, while maintaining OEM characteristics.

For users who value predictable lighting system behavior and want to avoid compatibility issues, this is a sensible choice for repair or replacement.

Mercedes Headlight System Expansion

If you are planning a comprehensive repair or upgrade of the front lighting area in your Mercedes and need other parts from the same group, such as headlights, adjustment motors, or light control units, check the available parts in the Mercedes Headlights category.

Additionally, if you are interested in optimizing vehicle operating costs in other technical areas, it is worth familiarizing yourself with the guide on the cooling system – you will find practical tips in the article Summer Heat vs. Cooling System: Used Radiators and Fans Guarantee Savings.