BMW or Mercedes?

its been a while, since someone asked me this question.

adibah : which would you prefer? BMW or Mercedes?
eddie : AUDI
adibah : eh.. tak aci la you ni. sekali lagi i bg you jawab
eddie : AUDI
adibah : you paham ke tak paham?
eddie : oh ni soalan objective ek? ok la kalau mcm tu, i pilih AUDI.
adibah : ugh...x nak lah kawan.
eddie : sejak bile kite kawan pon?

and the conversation goes on. Engineer buys Audi, businessman buys Merc, apek sayur buys BMW. get the joke? no? neither do i.