There where two different headlight clusters for the Mk2 and they used different bulbs, they were not year or model dependent and the option for fog lights was also in the same headlight cluster. So best thing for you to do, is turn on the lights you want to upgrade then open up the bonnet and take that bulb out. look at it and see what it is, Then do the same on the other side of the car as in some cases some people have found they have different bulbs from one side to the other.
Then while I know road laws are not largely adhered to in Greece bear in mind that LED headlights fitted aftermarket are unlikely to be legal and could get you stopped by the police