92 400E Aux fan wiring

[Rafi]

I was doing some work on my auxiliar fan cuircuit and noticed that the schematics that I have did not match the wiring on the car. In the schematic (below, if it loads OK) the fuse F22 (blade fuse next to brake reservoir) has red wires on both sides and it fuses the high current supply to the aux fan relay K9 but on the car the fuse F22 has black and violet wires on both sides and it fuses relay 87a output to the preresistor (where the hand is). My questions are:

1. Is my car the only one wired wrong?, or wrong schematics? Can other 400E/500E owners check their aux fan, blade fuse wires?
2. why protect this low fan speed (for A/C) circuit while the other fast speed fan (high coolant temperature) cuircuit appears to be unprotected?