My 1998 Jetta TDI has some AC problem. The fan wasn't going while the car wasn't moving but I had the AC on and I heard a loud pop. White smoke came from the passenger side of the hood, I pulled over and saw a lot of antifreeze in that section of the engine bay and what might be a sensor dangling that used to be connected to a cylinder that connects to the radiator and something else above it. It's in front of the passenger front side wheel, just behind the front bumper. I don't know if it's an urgent fix or not. I have no idea what that unit is and haven't been able to find it after numerous searches. Maybe since Jetta diagrams don't seem to include it, I can just pinch it off and keep driving. I drove it back home and there was no more smoke and it hasn't continued to drip on my driveway. My coolant levels are ok. Pic of the unit from the bottom included. The tube gonig to the bottom of the image goes to the radiator.