Our 2015 MKX recently started smelling like natural gas (rotten eggs). It is coming in through the air conditioner vents. There should be some way to fix this.
There have been a lot of complaints on the internet regarding this problem in Ford and Lincoln vehicles. But I am still looking for answers.
https://www.usatoday.com/story/money/cars/2017/02/13/ford-motor-co-defect/97856978/
https://www.classaction.org/explorer-exhaust-leaks
https://www.cars.com/articles/recall-alert-2009-2010-ford-edge-lincoln-mkx-1420682584903/