Well I'm not certain how well this works as I have not tried it yet. But this is supposedly how to discern if your car has keyless entry on a MkIII. I did find enough literature stating that keyless entry was an option through 96 and near standard from 97 on to convince me to try it.
You can check your car, here's how: You need 2 keys. Put 1 key in ignition and turn on (do not start car), close door, lock drivers door with 2nd key then hold in unlock position untill alarm goes beep, beep, beep. No beeps after 15 seconds? You do not have remote feature. You can check the receiver, located behind the headlight switch, remove the switch. Look behind it, to the right is a silver box (cruize control) to the left, black box=no remote, white box=remote feature. On the passat b4, the silver box behind the headlight switch = keyless alarm, white box = keyless alarm.