New car smell, it's awful. Sort of stale plastic if I were to describe it.
Amplified by long trips on bad roads as kid. Guaranteed to make you feel like vomiting on some sections. Now when I anticipate/pack for a trip I tend to smell that again even though I'm not even in a car.
Easily achievable if you only take calls in working hours. Then all working hours will have more than average calls per hour for a day.