Has anyone taken a look at their chrome vents. my car just had it's first service and a part from the tyre pressures being left too high (i put them up on a full load trip just before she went in and did not put them back to 31 psi- does anyone know if this should be checked on sevice ??) i have noticed that the vents have some sort of oxidisation on them on the front edges, this may be another (wheel centres) quality issue !!