tiger79.
Thanks for your feedback; interesting.
Do you have any personal experience regarding the PLANAR heaters.
I just studied the repair manual, the fan for instance is PWM controlled, not simple on/off. The heating output is variable between 1-4 kw, the airflow is variable between 70 - 120 cubic m/h, power consumption similar to Webasto, ignoring the maximum levels which are not regular operational values. The control panel is digital with LCD display for temp. indication/setting and includes a temp sensor. The price is just tempting. I'm listening to all serious advice and experience inputs from others.