Hi, i have mercedes E240 2003 which i recently purchased. When i start the car either in morning or at night the headlights keep switched on at auto settings but if manually changed to 0 will switch it off. Lights work fine manually but when kept on auto is always switched on. I have also kept the settings inside to manual rather than constant. Please help

I think the problem is in your headlight relay or switch.
You can use voltmeter to check this problem.