what do i do if I put gas in my diesel volkswagon?

Drain the tank, replace the fuel filter. I'd start there. Still doesn't run, mechanic.

Seeing as you can damage things more, I'd recommend just going to a mechanic. You're going to need to drain the tank and replace the fuel filter, but you should also flush out with diesel through the whole system, and make sure there is no gasoline in the lines, injectors, etc before starting again.

Thanks!

Drain the tank or blow up your motor!