Every time I start the 400E I hear a flapping noise like one of the flaps in the climate control system is opening or shutting. This has only been apparent in the last 3000 miles or so. this happens with the climate control turned off.

__________________
95 SL500 Smoke Silver, Parchment 64K
07 E350 4matic Station Wagon White 34K
02 E320 4Matic Silver/grey 80K
05 F150 Silver 44K