Okay, to stay true to topic I noticed something today on the C36 that might have bearing on the "hood flap" phenomenon. C36/W202 owners look around the headlights with the hood up...you should see a black rubber gasket running around the outside of the headlamp assembly that is held in place by 4 plastic clips along its top side. IF either of those rubber gaskets were hardened, cracked, misaligned, missing, etc you would be getting a ton of wind going underhood from a route never intended by the MB engineers.

Just an idea...Lee