My family own a limo company, so my first real memories of being in cars usually involved my dad driving me down to McDonald's with my two cousins when we were 5-8 yrs old in stretch limos, chryslers etc... lol
Also, I vaguely remember my Granddad's white Rolls Royce with a "BAD BOY" number plate, as he got stopped by the police twice (I think)... for what I now know to be the spacing of the letters and a "routine check, plus that's a nice reg mate" lol