A medication delivery device comprising a position determining assembly for determining absolute positions of a first member relative to a second member of the medication delivery device, the position determining assembly comprising: - a first group of electrically conducting electrodes interconnected through respective electronic devices each having a measurable electronic value, and a second group of electrically conducting electrodes being interconnected through respective electronic devices each having a measurable electronic value, wherein the first and second group of electrodes and the plurality of electronic devices are arranged on the first member, - first, second, third and fourth contact members (C1, C2, C3, C4) arranged on the second member, wherein the first and second contact members (C1, C2) are adapted to slide across and establish galvanic electrical connections to respective ones of electrically conducting electrodes of the first group of electrodes and wherein the third and fourth contact members (C3, C4) are adapted to slide across and establish galvanic electrical connections to respective ones of electrically conducting electrodes of the second group of electrodes when the first member is moved relative the second member so that the first, second, third and fourth contact members (C1, C2, C3, C4) connect to respective ones of said electronic devices as the first member is moved relative to the second member, and - an electronic control circuit electrically coupled to the first, second, third and fourth contact members (C1, C2, C3, C4), the electronic control circuit being adapted to determine the measurable electronic value of respective electronic devices between the first, second, third and fourth contact members (C1, C2, C3, C4), the electronic control circuit further being adapted to compare the determined measurable electronic values with a set of predetermined values to uniquely identify the position of the first member relative to the second member. - a first group of electrically conducting electrodes interconnected through respective electronic devices each having a measurable electronic value, and a second group of electrically conducting electrodes being interconnected through respective electronic devices each having a measurable electronic value, wherein the first and second group of electrodes and the plurality of electronic devices are arranged on the first member, - first, second, third and fourth contact members (C1, C2, C3, C4) arranged on the second member, wherein the first and second contact members (C1, C2) are adapted to slide across and establish galvanic electrical connections to respective ones of electrically conducting electrodes of the first group of electrodes and wherein the third and fourth contact members (C3, C4) are adapted to slide across and establish galvanic electrical connections to respective ones of electrically conducting electrodes of the second group of electrodes when the first member is moved relative the second member so that the first, second, third and fourth contact members (C1, C2, C3, C4) connect to respective ones of said electronic devices as the first member is moved relative to the second member, and - an electronic control circuit electrically coupled to the first, second, third and fourth contact members (C1, C2, C3, C4), the electronic control circuit being adapted to determine the measurable electronic value of respective electronic devices between the first, second, third and fourth contact members (C1, C2, C3, C4), the electronic control circuit further being adapted to compare the determined measurable electronic values with a set of predetermined values to uniquely identify the position of the first member relative to the second member.