Here's from the manual(if u don't have get hold at least of an owner's handbook, even better a RAVE, it'll help u)
Tyre pressures
NOTE: When towing, the additional load imposed may cause the tyre maximum load rating to be
exceeded. This is permissible provided the load rating is not exceeded by more than 15% and that road speeds are limited to 62 mph (100 km/h) and tyre pressures are increased by at least 0.2 bar(3 lbf/in 2 ).
Loading condition Pressure - bar (lbf/in 2 )
1.Normal operating conditions
Front 1.9 (28)
Rear 2.6 (38)
2.Vehicle loaded to maximum gross vehicle
weight
Front 1.9 (28)
Rear 3.2 (46)
Regardless of tyre type