Additional classifications based on seat numbers and trunk volume were also set by the Belgian Rent a Car association in order to provide a unified system for assessing the car types in online reservation systems and airline global distribution systems.
Klasifikasi tambahan berdasarkan nomor tempat duduk dan volume bagasi juga ditetapkan oleh asosiasi Belgian Rent a Car untuk menyediakan sistem terpadu untuk menilai jenis mobil dalam sistem reservasi online dan sistem distribusi global maskapai.