I disagree with the lower pressures mentioned, i drove all through the winter, ice & in 6 inches of snow / un-salted roads, all over the north of Scotland - including the Cairngorms
The 39psi front 41psi rear i found to be best, even at that i tend to wear the outside shoulders of the front tyres 1st, it took me a long time to see how the tyres were wearing, (the pressures depend on the setup/ how stiff the tyre sidewalls are/ the profile etc, + the pressures i run may be a bit high for some) - the engine in the diesel mk3 has a cast iron block, and is very heavy, the diesel Mondeo requires higher pressures that other cars like Focuses and Fiestas, and other makes, the figures i quote may seem very high to some
2 days (the period between the OP starting the thread and then diciding what pressures to run) is not enough time to properly try out different pressures and check the tyre wear
34 or 36 might be ok pottering about town or at low speeds but not at high speed or heavily laden are a bit low (on some sites they recommend 41psi in the front tyres for high speed/ heavily laden)
32 or 33 is ridiculusly low pressures for a mk3 diesel, the grip, handling and traction will be poor, and the steering will be heavy at those pressures the rims will be in danger of being damaged on pot-holes etc- the front tyres will look like they had a puncture!
If you buy a Ford / Mondeo, its important to run the right pressures, on decent tyres, and buy the right parts at the right price etc, - if you don't do it right you might end up complaining how rubbish Mondeos/ Fords are (how poor the grip/ how heavy the steering/ how easily the tyres/ rims are damaged etc- because you ran the pressures too low ) and that would not be Fords/ the Mondeos fault :)