Hello all I have a 2002 W210 E320 CDI. I found that while the fan is off myself & the wife felt heat coming from the front. We couldn't feel the hot air from the vents but we just felt hot and yesterday wan't particularly hot. Secondly the air con isn't working. Now I haven't checked if the air con needs re-gassing (which I shall try doing this week) but hot air was still blowing from the vents when I turned the fan on and set the air to cold. Left it on for a few minutes thinking it'll kick in but nope, still blew hot. The car has the normal knobs, not the climate control. Any ideas? What should I check/look at first?