Auto button, location / task / function - GF83.40-P-2147GI

MODEL 163 as of 01.09.01 with CODE (580a) Automatic air conditioning 

Fig 1: Identifying Auto Button And Temperature Thumbwheel

Courtesy of MERCEDES-BENZ USA

	Auto button, location	The auto button ( ) is located in the center in the upper half of the temperature selector wheel (2) on the AAC push-button control module (N22).
	Auto button, purpose	By pressing the auto button ( ) automatic switching is activated. Function feedback takes place by means of a red LED.
	Auto button, function	In addition to regulating the temperature, the blower speed and the air distribution are also regulated automatically in automatic mode. The blower speed is continuously controlled depending on the temperature difference between the specified and actual values.