Advice needed on tyre pressure (fourtrack)


Can anyone help me, I have bought a foutrack 2.8EL and am planning to tow a horse trailer with it.
I was wondering if anyone could tell me what the tyre pressure should be for everyday use, as I havent got a handbook, also do you have to put more air in when towing?

Tyre pressure

Hi there,
Acc. to the instruction manual the pressure should be front/rear 20/20 psi unloaded 20/25psi loaded. When towing I use apr 35-40psi.