I bought a Petromax 500 model a few years ago but ended up using a Coleman as the seals on the pump had died. After getting the bike pump adaptor from Pelam I did get it up and running but not until I had an interesting experiance.
I don't speak German but my 13 year old son does so I asked him to translate the German on the lantern and his response was, "Only use Petrol and don't use on a boat". Bit of a shame that as I live on a narrowboat but the next day I filled it with Petrol, pumped it up and put it on the riverbank while I lit it.
After watching 6 foot flames shoot out of the top I decided to get another translation.
"Do not use Petrol only use Parrafin" - Seems like that is the correct translation