Mercedes-Benz Headlight Control Unit LEFT – 749714

Description OEM headlight control unit (ballast/module) designed for Mercedes-Benz vehicles. This module regulates and powers the xenon or LED headlight system, ensuring stable illumination, proper beam control, and communication with the vehicle’s lighting electronics. Position: Left-hand side (LH) – passenger side on right-hand drive vehicles Key Functions: Controls voltage and current to headlight Manages xenon/LED light output Supports adaptive lighting systems (AFS) Enables DRL, low beam, high beam functionality Communicates with ECU for diagnostics Vehicle Compatibility: Mercedes-Benz E-Class W212 (2010–2016) Also used on selected CLS, C-Class, GLK (varies by spec) Interchange / Cross Reference: Paired with right side: 74962502 May correspond to OEM A212 / A218 series modules Common Fault Symptoms: Headlight not working Flickering or dim light “Low beam malfunction” warning Adaptive light failure Installation: Direct fit (plug & play) Coding/calibration may be required after installation