Air conditioning is becoming another 'must have' comfort feature in all cars. According to Behr's commissioned consumer research of 400 German car owners, the climate control system has become one of the most important features of automotive comfort. During this survey, conducted earlier this year, 53% mentioned it without prompting, compared to 28% in 1995. In contrast, the importance of the sunroof has sharply declined from 34% in 1995 to 13% in 2001. The German air conditioner and engine cooling supplier also found that, in addition to ease of operation, automatic functioning is highly rated for air conditioner systems and the absence of it is often considered a negative feature.