"Coolant sensor drops resistance at 105 degrees, which kicks (relay?) N22, which in turn kicks relay K9 to turn on the fan."

csnow,

I think your car is hooked up like mine. Here is how mine works (though I'm having problems with it)

There are 2 circuits: 2 sensors, 2 relays, 1 resistor, 2 mods of operation... (at least i think it's how it works via the schematic).

When the refrig. pressure switch located at the rec/drier get's to some press., it activates the fan in LOW speed via pre-resistor relay (relay B in fuse box) throught the RESISTOR.

When the Engine temp sensor (3 pole/2 connectors) located next to the cam cover @ left side gets to a certain temp (105 deg C i think), it activates the fan in HIGH speed via the aux fan relay (relay C in fuse box).

Hope this helps... if not, check CD1, Electrical Diagram, page 55.

late,

__________________
sjsfiji

'87 W124 260E (DD)
98K orig. mi. @7/15
CLK 7-Spoke Forged Wheels
Neuspeed springs/Bilstein Sport
4/3 bump (F/R)

'97 993 Carrera
106K orig. mi.
Always driven like it's stolen