2005 Mercedes SL-Class Owner's Manual - Page 187

Controls in detail Automatic climate control Setting the temperature Use temperature controls 1 and 7 to separately adjust the air temperature on each side of the passenger compartment. You should raise or lower the temperature setting in small increments, preferably starting at 72°F (22°C). Decreasing Turn the outer adjustment ring slightly to the left. The automatic climate control system will correspondingly adjust the interior air temperature. Adjusting air volume Use air volume control a ( page 183) for both automatic and manual air volume adjustment. Adjusting manually Press the control knob. The U light on the control knob goes out. You can now select one of nine air volume settings. Adjusting automatically Press the control knob. Increasing Turn the outer adjustment ring slightly to the right. The automatic climate control system will correspondingly adjust the interior air temperature. The U light on the control knob comes on. The airflow is adjusted automatically. i When operating the climate control system in automatic mode, you will only rarely need to adjust the temperature, air volume and air distribution. 185