Hi all,anybody know how to tune these and what the push buttons do..Many thanks,Pete

If the buttons say K,M,L etc those are just the different wavebands that were around back when

Yes as Joel says, they are for the different radio frequency bands, which are all still used for various purposes but more so in Europe than Australia.

L = Long wave ('LANGWELLE') - between 148 and 283 kHz but the radio only picks up 160-290 kHz. Used in Europe for high power long-range broadcasts. I don't know if there are any Australian stations.
M = Medium wave ('MITTELWELLE') - 520 - 1610 kHz. The radio indicates this with 6-16 on the dial. This is the normal AM frequency band.
K = Short wave ('KURZWELLE') - 3000 - 30,000 kHz (3 - 30 MHz). For long-distance stations, international broadcasting, time signals and amateur radio. The Blaupunkt looks like it receives between 4750 - 5060 kHz - this is called the 60m 'tropic band'.
U = Ultra-short wave ('ULTRAKURZWELLE') - 87 - 108 Mhz. This is the normal 'FM' band, although technically it's actually a segment of the VHF range. As there are more choices of music stations in this band, there are two U buttons.

To set a station, press the band button to select that range, then turn the dial to select a station ferquency. Pull that band button out and press back in to 'lock' that station. You only get one choice for L,M and K. You get two choices for U.

A most interesting radio for classic VWs but you won't get full potential in Australia. Our locally supplied radios only came with AM stations (BL, GB, UE, KY, CH, SM). Commercial FM broadcasting didn't even start in Australia until the 1980s.