Mercedes-Benz SL500 driver's headlights stay on in off position despite bulb replacement on Mercedes-Benz SL500

Some Mercedes-Benz SL500 owners report experiencing issues with headlights that remain on even when the engine is turned off and the key is removed. This concern may not be resolved by simply replacing the bulbs, as the persistent illumination could indicate an underlying electrical issue, potentially involving the headlight switch or wiring. Additionally, owners of models with advanced lighting packages, such as bi-xenon HID headlights, may find that features related to settings and sensor inputs cause unexpected behavior. To effectively address this problem, some owners recommend conducting a thorough diagnostic check of the headlight system, including the headlight switch, relays, and wiring connections. Given the complexity of modern automotive lighting systems, it is advisable for owners to seek professional assistance from a qualified mechanic or a Mercedes-Benz service center to accurately diagnose and resolve the issue.