Click or press space. If you're wondering, no I was not driving an older bus like I normally do (surprisingly). I was driving a 2020 IC CE with a Cummins B6.7 engine (and that engine sounded realistic, ngl). And yes, it's a 2020. Whoever modded it just didn't add the bolded SCHOOL BUS sign. P.S. I also heard the engine fan on this bus, but it’s a little quiet.