Did you install those in the mirror housing? ( illuminates with door closed and open )
Or in the door? Where it already had that red/white door light below the map tray ( open only )
Or completely new install?
All I know is my Metris does not have the red/white light in the bottom of the door, but there is a rectangular recess / opening in the plastic on the flat bottom of the door.
If you search MB Vito LB9 you will find a result from another forum, with some parts & schematic.
Don't know if we have all the same circuitry in the NA Metris models as the EU Vito & Viano version, as there is the light fixture, a cable it is supposed to plug into the door control unit, and flashing / dealer activation required to activate the light feature.