The power windows use relays; in my 116 they are behind the panel to the
left of the parking brake - perhaps in your more modern model the PW
relays were placed here - with the other electrical items. My
supposition, NOT first hand knowledge.

Off the top of my head two of those are seat relays. It's in
the schematic portion of the CD.

This is the abstract from manual (Chassis and Body, page 1502)

1st version (up tp 9/85)
A    Headlamp cleaning system
    Seat adjustment
B    Aux. fan
C    Aux. fan (preresistor)            For engine 116, 117
    Heater coil choke cover (preresistor)    For engine 110.92
D    A/C compressor (up to 9/81)
E    Power window/seat adjust.
F    Power window/seat adjust.
G,H    Aux. heater
I    ABS or lambda control
J    OVP or A/C compressor
K    Heated rear window (up to 9/81)
L    Int. wiper
M    Fuel pump

First row (nearest to fuse) from left (engine) to right (fender):
A,B,C,D
2nd row: E,F,G,H
3rd row: I,L,J
last row: K,M

Yours are A,B,D,E,F,L and K.  However, these relays have nothing to do
with the pressure switch.  The A/C relay controls the clutch.