Replacement headlight ballast control unit A 218 900 92 03 left right for Mercedes Benz GL-Class X166

1. OE Number: The OE reference number for this ballast control unit is A 218 900 92 03, A2189009203, 2189009203, 2189009700, A 218 900 97 00, A2189009700, 1668203689, A 166 820 36 89, A1668203689.

2. Compatibility: The headlight ballast control unit is a replacement for Mercedes-Benz GL-Class X166, ML-Class W166 (2011–2015), SL-Class R231 (2013–2016), and CLS-Class C218 (2011–2015). Function: Converts voltage, stabilizes current, and protects against overvoltage to ensure safe headlight operation and extend headlight life. Material: Made of aluminum alloy, providing heat dissipation, vibration resistance, wear resistance, high-temperature resistance, oxidation resistance, robustness, and durability. Installation: Constructed with high-quality SMD and THT components. Direct plug-and-play replacement; no coding or programming required.