The "belgian" Florian de Groote has a dutch name, is supposed to be Flemish but speaks french with a Norwegian accent.
The car stealing the generator gets stuck in the mud and is spinning its wheels. When it starts moving it makes a squealing sound like tires on dry asphalt despite the ground being wet and muddy.
Austin-Healey 3000 driving into the estate had a straight 6 engine but the sound track is clearly from a v8.
The restaurant where Eddie and Susan meet with Florian in Belgium has the logo of the Smith & Wollensky steakhouse chain clearly visible on the wall behind them. Smith & Wollensky has no locations in Belgium.