At my school most kids drive Volvos, Mercedes', Lexus', BMWs, there are also a few Land Rovers, and one Jaguar. Very few people have old cars. I'm unfortunate enough to have a 1999 Mercury Sable.
2. How would you make Mercedes, and Lexus plural?
I'm pretty sure I did it completely wrong.
EDIT: I know that I'm fortunate. I just meant that it sucks in comparison to the other cars at my school. Plus it's my dad's car that he still uses.