2009 Ford Flex Owner's Manual - Page 252

Tires, Wheels and Loading FWD GCWR (Gross Combined Weight Rating)/Trailer Weight Class Maximum Trailer weight Tongue load GCWR 200 lb (91 kg) Class I towing 6900 lb 2000 lb (standard) (3131 kg) (907 kg)* 450 lb (204 kg) Class III towing 9357 lb 4500 lb (optional) (4245 kg) (2042 kg)* * For towing trailers up to 3500 lb (1588 kg), use a weight carrying hitch and ball which uniformly spreads the trailer tongue loads through the vehicle's underbody structure. For towing trailers over 3500 lb (1588 kg), up to 4500 lb (2042 kg), it is recommended to use a weight distributing hitch to increase front axle load while towing. AWD GCWR (Gross Combined Weight Rating)/Trailer Weight Class Maximum Trailer weight Tongue load GCWR range 200 lb (91 kg) Class I towing 7050 lb 2000 lb (standard) (3199 kg) (907 kg)* 450 lb (204 kg) Class III towing 9521 lb 4500 lb (optional) (4320 kg) (2042 kg)* * For towing trailers up to 4500 lb (2042 kg), use a weight carrying hitch and ball which uniformly spreads the trailer tongue loads through the vehicle's underbody structure. WARNING: Do not exceed the GVWR or the GAWR specified on the certification label. WARNING: Towing trailers beyond the maximum recommended gross trailer weight exceeds the limit of the vehicle and could result in engine damage, transmission damage, structural damage, loss of vehicle control, vehicle rollover and personal injury. 252 2009 Flex (471) Owners Guide, 2nd Printing USA (fus)