why would a 4 wheel tow cause any problems?
the only bit thats fragile is the centre diff. if your towing with all four wheels on the ground the front and rear axles are doing the same speed, so the diff isnt under any load.
Tha cars handbook specifies (for 4wd manual transmission):
The car may be towed with a tow bar, or tow-rope in the normal way, with all four wheels on the road.
When towed with a break down truck, the car can also be towed with wheels lifted at the front or rear. When towing with wheels lifted it must not be towed faster than 50km/h AND it must not be towed further than 50km.
If it is not possible to tow the car in the normal way with all four wheels on the ground, or if it has to be towed further than 50km, it must be transported on a car transporter on trailer.