159 2.4 20007 plate
19,500 DPF/EGR by
AO Silver Member
Join Date: May 2009
Location: United Kingdom
Leaking hose or radiator.
Out of the exhaust pipe (head gasket failure.)
In your sump (head gasket failure.)
Check coolant level (it's a lot of water if it's all in there!) and also oil filler cap for mayonnaise.
If not in sump and no mayonnaise refill it, start it up and watch for it shooting out of your exhaust. You will get a small amount of water when engine is cold but if there is lots that's your head gasket gone.
Was it lost while stood or lost while driving?