OObals

I'm looking for some advice regarding an issue with my 2017 Mercedes E-Class 220 Estate. When I lock the car, all the lights initially turn off as expected. However, after about a minute, the left-side dipped headlight comes back on and stays on. This happens regardless of whether the lights are set to auto or manual, and there are no fault warnings. I've tried adjusting the indicator stalk in case it was related, but the problem persists. Does anyone have any ideas on what might be causing this?