Smells Like
Rotten Eggs

Check the air filter. Is it dirty?

If Yes, Replace the air filter

If No, Have the fuel injection sensor checked by a mechanic at Car Tec SA

Muggy/Musty from A/C vents The drain pan of the A/C evaporator unit isn't draining. It is best to have an A/C specialist look at this, as the clog may be further up in the system and difficult to access