2006 5 cyl , turbo S80. The low coolant light comes on about once each 5 days. Each time I refill with about a pint of coolant. It seems to be getting worse.
The reservoir tank caps holds pressure. There are no puddles beneath the car. There is no steam coming out the exhaust( head gasket probably OK). No obvious leaks anywhere.

Any ideas as to where the coolant is going?

 

Hi, I had the same issue with mine. With the engine running, take a look on the drivers side under the turbo where the heater hoses connect up. I had a split on the under side of one of my hoses. I could see the coolant on top of the heat shield, but no dripping under the car. hope this helps.
Eddie