Tyre Pressures for 6C [standard]

I need help with knowing the recommended tyre pressures - and yes - I know they should be on the fuel flap. 

A friend has a 64-reg Polo [think it might be early 2015] - pretty sure it is the facelift version, which makes it a 6C. Engine is 1.2TSI.

He bought it new - and ordered the 17inch wheel option with 215/40 tyres. Since a back-problem he has been finding them far too hard/bumpy - so he recently bought a set of genuine Polo Aspen 15 inch wheels - with 185/60 tyres - which I have just helped him to fit.
I went to the fuel flap - expecting to find the tyre pressure label giving us various sets of pressures for each of the standard wheel/tyre options - but probably because it was ordered with the 17 inch wheels from new - the label ONLY gives pressures for that size!!!

If you have a 6C fitted with 15 inch wheels [from new] could you tell me what pressures it recommends [front/rear - part/full load] - or even better - just post a photo of the label in the fuel flap.

We were told 185/60 or 195/55 were "standard options" on 15inch wheels - don't know if that would affect the pressures ???

Also not sure if engine type affects pressures - for instance might a diesel be heavier - so if responding, please let me know your engine type.

Cheers