Why does the left headlight of the Mercedes GLC stay on after parking?

[NaomiMarie]

Reasons why the left headlight of the Mercedes GLC stays on after parking: Vehicle's Welcome Home function: First is the normal Welcome Home function where the lights remain on for a period after turning off the engine. Under normal circumstances, the Welcome Home function's light delay will not exceed 5 minutes, and this function does not depend on the lighting state before turning off the engine but follows a fixed lighting mode. Regardless of the position of the light switch before turning off the engine, the Welcome Home function will default to turning off the high beams and daytime running lights, only keeping the low beams on. Night parking light is on: Night parking lights were originally a mandatory requirement in some U.S. states, where all vehicles must keep their taillights on after parking and turning off the engine at night to alert pedestrians or following vehicles in environments without streetlights. Most vehicles will only light up one light, specifically the one on the side closest to the road, to indicate the parking position and the edge of the vehicle to following traffic. However, this lighting strategy is generally only applicable to models equipped with LED taillights.