Oh bother, I would expect a Boca to have a temperature gauge fitted as standard - something very wrong there, even my wife's Polos including her current 1.2TSI 110PS one has a temperature gauge, my daughter's late 2009 1.4 16V 85PS does not, but that is acceptable - just!
Edit:- the bottom line is, anyone wanting a car like a Boca normally knows what is going on under the bonnet, and that includes engine coolant temperature and oil pressure, as well as the boring things like fuel quantity, engine revs and speed!