Laughing here as I'm reading the comments I hadn't yet seen until just now.

I am hopeless when it comes to cars. One time a chap in a pub was quizzing me on sports cars and their capabilities and petrol consumption, gear changes etc etc. I looked at him blankly. He said: Oh, sorry. I just assumed you'd know because you drive one.

Ha! I didn't even know where to put the water in the damn thing! ;o)

In fact when it got a puncture once, I couldn't find the spare wheel!