320i 1999 leaking coolant fluid

My m52tub20 is leaking coolant fluid. Thought it was the waterpump, but it wasn't (switched it anyways). Thermostat is not leaking either. I can't find the leak and it's really weird. It doesn't tend to leak when it's warm, but the day after I've parked it, there's a pond of coolant fluid under. It's leaking from the front of the car, that's all I know.

Anyone got a tip?

320i 1999 leaking coolant fluid