Thanks for the confirmation! Now I can rest at ease. Good call on the shrinkwrap - I'll have to pick some up next time I'm at Fry's.

With the regard to the switches, you are correct, jumpering the one on the top caused the aux fan to come on. Jumpering the other *appeared* to cause an extemely insignificant audible change in idle - so insignificant that I'm not sure it actually occurred...

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280