The Mercedes-Benz E-Class should be practical enough for family use if its cabin layout suits your passengers. Useful size figures include 2025 E 200 Avantgarde Line: 4949 mm; 2025 E 200 Avantgarde Line: 2065 mm; 2025 E 200 Avantgarde Line: 1468 mm; 2025 E 200 Avantgarde Line: 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.