Recirculation Mode
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2001 Mercedes-Benz ML55, 2001 Mercedes-Benz ML430, 2001 Mercedes-Benz ML320, 2000 Mercedes-Benz ML55, and 2000 Mercedes-Benz ML430. However, it is still accessible from the selected car via links, so may be relevant.
To check recirculation mode, press fresh/recirculation button. Ensure fresh/recirculation indicator is illuminated. Set blower speed knob to position No. 4. Blower fan noise will increase noticeably. If operation is not as specified, check wiring between recirculated air flap element, heater-A/C switch and No. 16 fuse (15-amp).