It's very likely you have a leaky heater core.
Your heater uses somthing akin to a mini radiator to transfer heat from your engine to the cars interior. However, if you're smelling antifreeze, you have some type of leak.
Some people say that the smell of hot antifreeze smells like mold. It could be possible you are smelling the antifreeze from the engine.
Coolant leak, possible heater core. Suggest to have it pressure tested to find leak.
heater core is shot and you have to get a new one
Yes antifreeze is sweet smelling, burning oil stinks and gasoline is, well gassy.
Radiator fluid or antifreeze as it's called circulates through your heater core under the dash and provides you with heat and warm air for defrost. If you are smelling it inside the car then your heater core may have a leak. IS there any visible signs of leakage on the carpet in the car? The heater core usually has an inlet tube and an outlet tube through the firewall and maybe one of these is leaking. It could be leaking on the outside as well. Look for wetness around any hoses connecting to any tubes coming through the firewall. If you keep having to add antifreeze, you definitely have a leak.
If you are smelling the sweet but unpleasant aroma of antifreeze, your vehicle is leaking it somewhere. A lot of the time the culprit is the water pump. They have a weep hole and when the bearing starts to fail it will begging leaking from this hole. I would start by getting myself a flashlight and start scanning your engine's water hoses for a leak. Check the mail hoses going to/from the radiator as well as the heater hoses leading to the firewall. Do you smell the antifreeze odor INSIDE the car? If so, it could be your heater core that's failing.
Breathing fumes from antifreeze cannot be good for your health as antifreeze is poisonous. If you are smelling fumes in your car you probably have a heater core leak. I recommedn you have this repaired ASAP. The only fix for a leaking heater core is to replace it. A very labour intensive job that is quite expensive.
Metal smelling.....
I am having the same problem with my Ford Explorer 2011. When I accelerate to 60-65 I start smelling the smell. I have had my car in and out of service for the past year about this smell and they finally told me it is the carburator.
The fluid is in the transmission is low or it needs to be changed. Check the fluid level and see if is full or if it brown and burnt smelling.
Ammonium carbonate was known as a smelling salt.