2000 sl2 still having problem Please Help!

Recently I replaced my radiator because it was leaking. I also had to replace the fan because it was out. Went a few days with no problems and now my coolant light is coming on and you can smell the antifreeze under the hood. Also my temp gauge seems to be rising the longer I drive and also the heater is blowing cool air. So what else could be going wrong? When I idle it almost sound liquidy under the engine if that makes any sense.

You haven't got all the air out of the cooling system. Try jacking up the front of the car and squeeze the hoses repeatedly and vigorously and then check the coolant level. Top it off and then start the car with the heater going and continue this process for awhile until you can't add any more coolant.