2007 Mercedes S-Class Owner's Manual - Page 324

Controls in detail Seats Seat ventilation* The buttons for seat ventilation are located on the respective door. The blue indicator lamps on the button come on show the ventilation level selected. Level 3 2 1 off Three indicator lamps on (highest level) Two indicator lamps on One indicator lamp on (lowest level) No indicator lamp on 1 Seat ventilation button Switch on the ignition ( page 315). Switching on: Press button 1 repeatedly until the desired ventilation level is set. One or more blue indicator lamps on the button show the selected ventilation level. Switching off: Press button 1 repeatedly until all indicator lamps go out. i If one or more of the lamps on the seat ventilation button are flashing, there is insufficient voltage available since too many electrical consumers are turned on. The seat ventilation switches off automatically. The seat ventilation will switch back on again automatically as soon as sufficient voltage is available. i The seat ventilation for the driver' seat can be activated using summer opening feature ( page 355). 323