The present invention relates to an electrical connector including a first connector housing with a wall arranged substantially perpendicular to the connecting axis. The wall has an opening for insertion of a second connector housing. A first collar extends from the wall concentrically around the opening. A second collar extends from the wall concentrically around the first collar. The first collar and the second collar are spaced apart. A sleeve-shaped coding element is attached with a first end to the free end of the first collar. The first collar and the sleeve-shaped coding element are arranged concentrically around the opening. A sealing element is arranged in a sealing area between the first collar and the second collar. The sleeve-shaped coding element includes a supporting feature at its first end which is suitable for holding the sealing element in its position.