Greetings, have searched the forum and could not find this topic. Have a 2000 c230k and while driving it all of a sudden developed a sour smell coming out of the air conditioner. Now, when you first fire it up, I have to leave the windows open for a spell and it clears up a bit but not entirely. Pretty packed under the hood and can't find the air intake or cabin filter. Any help appreciated. Can't swing what the dealer is going to hit me up for this. Thanks...