The BMW 5 Series should be practical enough for family use if its cabin layout suits your passengers. Useful size figures include 2025 530i M Sport: 5060 mm; 2025 520i M Sport: 5060 mm; 2025 530i M Sport: 1900 mm; 2025 520i M Sport: 1900 mm; 2025 530i M Sport: 1515 mm; 5 more variants. Wheelbase and seating matter most day to day because they influence rear-seat comfort, child-seat friendliness and how relaxed the car feels on longer trips.