sleep at/on/behind the wheel.

I'd say the idiom is "to fall asleep at the wheel" or "to be asleep at the wheel." "He fell asleep at the wheel and crashed into a tree." "To be asleep at the wheel" can also be used figuratively, meaning "to be unaware of surrounding conditions." "Sorry, I was really asleep at the wheel -- I didn't realize everyone was waiting for me to get ready."

And I guess here wheel means a car steering not a tire. In south east asia, we don't call it "wheel".

GB

Yes, "wheel" here means "steering wheel." What do you call it?

I think there's a band called "Asleep at the Wheel."

We call it "steering". the word "wheels" is used for tires.

Thanks for help.

GB