2002 POLO 9N1 MK4 No central locking

[Telamon]

Hi there. I have a 200 9n1 mk4 polo that I got from my grandparents. It doesnt seem to have any form of central locking which I thought was a bit strange as all other polos of the same generation seem to have it. There is no button/ light on the key, no button on the driver's door on the inside either. Do some polos not have it or what am I missing here.

Thanks in advanced