Got to work, noticed coworkers 04 1.8 turbo jetta sitting in the parking lot, blowing steam and leaking coolant. The car was shut down maybe 10 mins earlier. went inside and got her to pop the hood; looks like a hose fitting on a ~1/2" dia hose routed at the left end near cam sprockets(facing engine from bumper) came undone from a barbed plastic fitting. This appears to go to the rear of the motor and converts to a metal pipe. Didnt spend much time looking, but VW/Audi guys: is this a turbo coolant hose or a heater hose? I think the hose originated out of a 1/4-turn valve w/vacuum actuator behind the radiator. I dont understand how this hose blew off the barbed fitting, it appear to have OEM hose clamp.