The Mercedes-Benz EQS should be practical enough for family use if its cabin layout suits your passengers. Useful size figures include 2025 EQS 500 4MATIC: 5216 mm; 2025 EQS 500 4MATIC: 2125 mm; 2025 EQS 500 4MATIC: 1512 mm; 2025 EQS 500 4MATIC: 5. 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.