Heating Doblo (diesel)

Hello, in the ADAC test, the heating performance of the Doblo 1.6 JTD Multijet is rated 5,5 rather poorly. If I look at some typical suspects, I found only one jeep, which is rated worse. Does the Doblo really soooo mis? (For this, the jamming in the forum is quite restrained) In the test, the car is cooled down to -10°C and then the time is measured until the interior is reached 22°C. In the front row, 29 minutes, in the rear 35 minutes, b The temperature is reached. Actually you should also be satisfied with 18-20°C ….. Since the additional heating only works until a certain cooler temperature is reached, this should not change much. The seat heating is also an option. Many greetings Dieter PS: It would also be interesting to know which note the old beetle would have received during the ADAC test.