After a recent change of coolant in my E85 Z4 I seem to be losing a small amount of fluid from the radiator. I can't find a leak under the car but I did find signs of fluid on the top centre of the radiator cover. (see attached). Apart from a small weep through the filler cap I have no idea how the fluid could get there. Can anyone tell me what is under the cover? Is there anything under there worth removing the cover for?
