2013 Lincoln MKZ Hybrid - antifreeze odor in the vent

A strong odor coming from the passenger air vent which smells like antifreeze or fuel. When I take it to the dealer they say they don’t smell anything.

Your vehicle is no longer under warranty so you don’t need to take it to the dealer. Find a good independent mechanic and let him look at it. My guess is that you have a leaking heater core but it’s only a guess.