The ranger has a tow rating of 7500 lb.

The gross vehicle weight (ie the max vehicle weight with the heifers, obviously stuffies) of the C15 is 1500 kg (hence the name) or 3300 lb.

Uhaul rents a car tow trailer rated for 5000 lb that weighs 2200 lb [1].

The Ranger, then, can tow the C-15 + the heifers = 5500 lb and have 2000 lb left over to put two real heifers, and do this legally at 70mph.

Citroen makes great vehicles though. Amazing off roaders.

[1] https://www.uhaul.com/Trailers/Auto-Transport-Rental/AT/