For new taxis (sampang)...
you got to install your own....

buy a cheap one will do.....
If you are driving limousine.... Mercedes-Benz have a 6 disc
changer...(in all their vehicles excluded Maxi lah).
Have a good range of CDs (different languages) is a advantage to
foreign passengers. at most of my previous encounter... all give
tips.... (I ever received a
$150 tip just for playing Japanese
CDs). 