The present invention relates to a medication delivery device and a method of manufacturing a medication delivery device with a housing (10) accommodating a cartridge suitable for containing a medical product, the housing having an at least partially transparent window on a front surface (18) for displaying information, and arranging a light source (30, 30') within the housing (10), wherein the light source (30, 30') is adapted to provide an illumination of the at least partially transparent window (8).