My car showed an engine fault at 3000 kilometers, asking to check the emission system. Should I use 92 or 95 octane fuel for this car? Can someone with expertise help out?

Have any car owners experienced the collision warning system automatically turning off when driving in heavy rain? I've encountered this, and I have to turn it back on afterwards. Is this normal?

Hey folks, my emission warning light was on for a few days, then it went off. Anyone else had the same issue? What could be the reason?

Why does the start-stop function keep showing "Battery Optimization" and not work? Is there an issue with the battery?