Mercedes-Benz R-Class 2006 Owners Manual - Manual (Page 218)

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Controls in detail
Climate control
1 Side air vent, adjustable
2 Thumbwheel for air volume control
for left side and door air vent
3 Left center air vent, adjustable
4 Right center air vent, adjustable
5 Thumbwheel for air volume control
for left center air vent
6 Thumbwheel for air volume control
for right center air vent
7 Thumbwheel for air volume control
for right side and door air vent
8 Side air vent, adjustable
9 Door air vent, fixed
a Climate control panel
b Door air vent, fixed
i
For draft-free ventilation, move the
sliders for the center vents
3 and 4
to the middle position.