There are 2 places on the K12 where checks need to be done and both are a pain. 1 being the coolant expansion tank level check, the other being the rear brake fluid reservoir level check. I check mine by using a strong torch (flashlight) to backlight the reservoirs I suggest some clever person needs to create an LED panel which could be installed behind each reservoir and operated by a switch when the pannier lids are opened (like the trunk interior light). No heat from the LED's so quite safe. Any takers ?