Does this happen when the heater is on? If so, probably your heater core is the source of the leak. Otherwise, you have a leak elsewhere and need to do a better job detecting it. If you absolutely can't see any, spray some brake cleaner around the head gasket with the engine running... if you get a sudden kick up in RPMs, you've found your culprit.
probably a blown head gasket.
the heater core may be plugged up
heater core has a pinhole leak! Only shows when under pressure .remove and replace not good to breath antifreeze vapers!
Lack of antifreeze or wrong mix of antifreeze and water.
Ask this question again specifying what the car is.
If it heated up on you, chances are that you warped the cylinder head and now have a blown gasket. You don't give very much information, here.
How To Find & Fix Coolant Leaks http://www.aa1car.com/library/coolant_leaks.htm
Nothing Nothing
Volkswagen or any other vehicle shouldn't use any antifreeze. If any car is using antifreeze something is wrong.
You smell antifreeze because you are overheating. Check your water level in your cooling system to make sure it is full. You may need to replace your thermostat or rdiator cap to fix the over heating problem.You may also have to check your radiator fan to make sure it is working properly.
It sounds a bit like a water pump that went out all of a sudden. Losing the belt would kill the power steering, so maybe the pump bearing failed and the belt burned or jumped off.
Your heater core has failed.