This week I’ve been running the car for 5 mins before taking the baby out to nursery in it, so that the windscreen defrosts and car warms up for her. I’ve noticed that when I go back out to it, the area around the car smells strong of exhaust fumes. Is this normal or something wrong with the car? I’ve never let it run like that before having DD and only do it for a few mins to warm up before we get in. Worried!