Evening all, I have read up on this problem but still can't get my head around it. I have a W203 CDI and I do know diesels take a little longer to warm up. My problem is that the car doesn't blow 'hot' air from the fans. I get ice cold air if I chuck the climate control knobs to cold air, but it takes ages for the warmer air to flood the cabin. Is it my thermostat? Thanks?