me,,,, 32psi all round. done this pressure in every car i have had. and believe me when i say, ive had loads
185/55/15 tyres seems a weird size tbh, i now have 195/45/15 and think they suit my car really well, any size 15 in my opinion would be a standard size of 195 ( 45 or 50 ) 15.
even my 406 daily has 32psi and the sizes are 205/60/15. and my passat20vt has 205/55/16 also with 32psi all round