Clicking Noise From Behind Center of Dash on Mercedes-Benz C350

A repetitive clicking noise from behind the center area of the dash panel is usually caused by a broken stepper motor actuating arm. The actuating arm controls the direction of air flow in the climate control system. Disassembly of the center console will be required to access and change the broken arm with the updated, reinforced part.

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Average mileage: 89,800 (89,800–89,800)
5 model years affected: 2006, 2007, 2008, 2009, more2010
6 people reported this problem
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2009 Mercedes-Benz C350 89,800 mi,
Noise pretty much stops if you turn off the fan if this is same problem I have.