I think the OP means approx. + 4C when he used the ~ key, not minus 4C. HTH

I feel much more comfortable now!!

Phew. Thank goodness for that. With small fonts and typeface on this site, my ~ was mistaken as being - sign

I have to confess I read it as minus too - a classic example of the eye seeing what it thinks is there, not necessarily what actually is. Sorry - now I look at it it's perfectkly clear: ~

Even that (about 40 proper degrees) seems uncomfortably cold - you wouldn't want that as ambient temperatuire even on a hot day. I've had several VAG cars and even the 'low' setting, which has the fan full on, is never less than comfortable.

Well don't forget that is the temperature inside the air vent and that the cold air has got to blend with high/humid cabin temps. Anyway, I have made a faux pas, unforgiveable I suppose in someone with a scientific background of over 50 yrs. I forgot to calibrate my instruments!!!

Today I took my digital thermometer's probe and plunged the first 2 inches or so into crushed melting ice and to my surprise found that the stable state temperature read 2.3c and so the error here is much higher than I thought. I also remembered that I had one or two Mercury in glass 0-100c thermometers and put those alongside the probe and they read, near as damn it 0c. It was seem that my aircon vent temp. is lower than I first thought.