I have had my JLU since July '18 and all summer when i turned on the air conditioning i would get a sweet smell. Exactly like Maple Walnut Syrup. I tried recircuilating air, turning on heat, foot air, middle air, and defrost. Still there. Mostly I would get it when I drove more than five minutes, run into a store, then come out and start engine, and right away I get the smell. Finally I bring it to my dealer. He says it's anfitreeze, but cannot see anything. I am bringing it back next week for a new heater box. The visit took a while, but that was because they started a case on it and found that there was, on record, one other simillar case. No drips but probably a pinhole vaporizing. I'll update after a new heater box.