2005 Mercedes C-Class Owner's Manual - Page 107

Controls in detail Seats Seat heating* The switches for the front seats are located in the center console. The red indicator lamps 2 in the switch show the heating level selected. Level 3 Three indicator lamps on. After approximately five minutes, seat heating is automatically switched to level 2. 2 Two indicator lamps on. After approximately ten minutes, seat heating is automatically switched to level 1. 1 Seat heating switch 2 Indicator lamps 1 One indicator lamp on. After approximately 20 minutes, seat heating is automatically switched off. off No indicator lamp on. Switch on ignition ( page 33). Switching on seat heating Press switch 1 twice. Three red indicator lamps 2 in the switch come on. Continue pressing switch 1 until desired seat heating level is reached. Switching off seat heating Press switch 1 repeatedly until all indicator lamps 2 go out. i If one or all of the indicator lamps 2 on the seat heating switch are flashing, there is insufficient voltage due to too many electrical consumers are turned on. The seat heating switches off automatically. The seat heating will switch back on again automatically as soon as sufficient voltage is available. 105