The ‘Headlamp Range Control Malfunction’ warning in Mercedes-Benz vehicles indicates an issue with the automatic headlamp leveling system. This system adjusts the angle of the headlights based on vehicle load and driving conditions, ensuring optimal visibility without blinding oncoming traffic. When the system fails, the cluster displays ‘Headlamp Range Control Malfunction.’ This article explains how the system works, common causes of malfunction, diagnosis methods, and repair solutions.
What is the Headlamp Range Control System?
The headlamp range control system automatically adjusts the vertical aim of the headlights according to vehicle load and pitch. It uses height sensors on the axles, a control unit, and electric actuators in the headlamp assemblies. This ensures proper illumination of the road under all driving conditions.
Common Error Messages in the Instrument Cluster
When this system malfunctions, the following warnings may appear:
• Headlamp Range Control Malfunction
• Adaptive Headlight Inoperative (related system error)
• Active Light System Malfunction
Causes of Headlamp Range Control Malfunction
The most common causes include:
1. Faulty axle height sensors (front or rear).
2. Damaged or stuck headlamp leveling actuators.
3. Faulty headlamp control unit (ECU).
4. Wiring or connector issues between sensors, ECU, and actuators.
5. Calibration errors after suspension or headlamp replacement.
6. Battery voltage problems affecting control modules.
How to Diagnose Headlamp Range Control Issues
Begin diagnosis by checking axle-mounted height sensors for physical damage or disconnection. Using Mercedes-Benz diagnostic software such as Xentry, Vediamo, DTS Monaco, or the MBCOD Box with ELM327, scan for fault codes like B2413 (headlamp actuator fault) or B2415 (height sensor fault). Check live data for sensor readings and actuator positions to identify faulty components.
How to Fix Headlamp Range Control Malfunction
Steps to resolve issues include:
1. Replace faulty height sensors on the axles.
2. Replace or repair damaged headlamp actuators.
3. Repair or replace wiring/connectors as needed.
4. Replace or reprogram the headlamp control unit if defective.
5. Perform headlamp range calibration using Mercedes diagnostic tools.
6. Clear stored fault codes and test the system operation.
Preventive Maintenance for Headlamp Range Control
To prevent headlamp control issues, regularly inspect sensors and wiring, avoid driving with damaged suspension components, and recalibrate the system after major repairs or replacements. Maintaining a healthy vehicle battery also ensures stable ECU performance.
When to Contact a Specialist
If the ‘Headlamp Range Control Malfunction’ warning persists after basic troubleshooting, professional diagnostics are required. At MBCOD in Dubai, we specialize in headlamp system diagnostics, ECU programming, sensor calibration, and electrical repairs. We also provide mobile diagnostic services and emergency support across Dubai, Abu Dhabi, Sharjah, and Ajman.
Conclusion
The ‘Headlamp Range Control Malfunction’ warning should not be ignored, as it affects road visibility and safety. With accurate diagnostics and timely repairs, the headlamp leveling system can be restored to full functionality. Trust MBCOD in Dubai and across the UAE for expert Mercedes-Benz headlamp diagnostics and repairs.