JackBean 645ci

Hello all Bimmer owners club members After a long time away from BMW and a long time of company car use, I have rejoined the BMW flock with a nice small, cheap, economic 2004 645ci...:-) Quick question to all of those who may know- Every time i get back to the car a puddle of water is found underneath, quite large. The cooling system holds pressure at 2bar with engine warm without any drop in pressure...oil is clean without visable signs of water, no white smoke, engine is smooth yet clearly it has a leak, Its not aircon drainage, doesnt seem to be using much water either which is bizarre any hints before i take it to my local shylock and have my wallet bled before my eyes?

Hello all Bimmer owners club members After a long time away from BMW and a long time of company car use, I have rejoined the BMW flock with a nice small, cheap, economic 2004 645ci...:-) Quick question to all of those who may know- Every time i get back to the car a puddle of water is found underneath, quite large. The cooling system holds pressure at 2bar with engine warm without any drop in pressure... yet clearly it has a leak, Its not aircon drainage, doesnt seem to be using much water either which is bizarre any hints before i take it to my local shylock and have my wallet bled before my eyes?