Avocet
Well-Known Member
As part of their type approval testing, the major manufacturers have to do a set number of hill starts (think it might be 5) within so many minutes (that might be 5 too) on a specified slope, with the vehicle and a trailer laden to Gross Train Weight. The Max. recommended towing weight has as much to do with driveline warranty as with safety. Remember that the manufacturer needs to honour the warranty even if someone buys a car new and runs it at GTW every day of its life in a hilly area!