As the post above mentions....double check you are undoing it in the correct direction, it's an easy mistake to make especially with the bolt being upside down.
Personally, I would ride the bike to create heat, then tap it a few times with a hammer and undo it.
If you're not confident doing that, then take it to a BMW dealer. I'm sure there is one in Malaga and the will have experienced with this issue.
Personally, I would ride the bike to create heat, then tap it a few times with a hammer and undo it.
If you're not confident doing that, then take it to a BMW dealer. I'm sure there is one in Malaga and the will have experienced with this issue.