2005 Mercedes SL-Class Owner's Manual - Page 121

Controls in detail Seats Seat ventilation* (standard on SL 600 and SL 65 AMG) The switch is located on the door. The blue indicator lamps on the switch indicate the selected ventilation level: Level 3 2 1 off Three indicator lamps on Two indicator lamps on One indicator lamp on No indicator lamp on Switch on the ignition ( page 36). Switching on seat ventilation Press switch 1. Three blue indicator lamps on the switch come on. Continue pressing switch 1 until the desired seat ventilation level is reached. Switching off seat ventilation Press switch 1 repeatedly until all indicator lamps go out. i In normal operation the seat ventilation will switch off automatically after about 30 minutes. ! If one or all of the lamps on the seat ventilation switch 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. 1 Seat ventilation switch 119