You probably already know what I’m about to tell you. But if, like me, you’ve somehow made it this far in your life without finding out, allow me to change your life forever.
You know how you’re driving an unfamiliar car, you pull into a gas station, and you can’t remember which side the tank is on? And you have to get out and check, or else play the odds?
Ahem.
There’s an arrow that tells you.
The Champion of the People has done his work for the day. Ladies and gentlemen, you’re welcome.
Brian D. Buckley 
I learnt about it too very recently!!! 🙂
Cool! So it’s not just me then.
Wow. You know, wow.
(I do, by the way, appreciate the idea that it’t only in an “unfamiliar car” where one might have this particular difficulty. 🙂 )
I figure we’d all save a little face and pretend we only get confused in rentals. 😉