When I spotted this rig, past experience dictated that its inhabitants would speak German.
“BL” seems like it would indicate Belgium, which has a small German-speaking population.
But in fact it indicates the Bratislava district of Slovakia.

Pretty well traveled:_____, Peru, Brazil, Bolivia, Paraguay, Czech Republic, _____, Chile, Argentina, Uruguay, Spain, Finland, Luxembourg, Sweden, Denmark, Belgium, Germany, Gibraltar, _____, Norway. Starting upper left, diagonally down to the right, any idea what those three are?
Anyway, in true Euro travel style, it appears equipped for anything.
I still chuckle when I see these massive fuel-guzzling monsters, remembering this.