don't worry about it, cossies genrally run about the 80 degree mark. there is no way it will maintain 72 degrees esp when stationary.
my car has a new engine, new water pump, 60mm thick race spec rad & a pro alloy turbo cooler, my normall operating temp at cruise is 76-78 degrees thats in this country which is a little cooler than yours.
all sounds fine now