W109 3.5/4.5 Identify small fuse boxes in engine bay/AC relay

[werminghausen]

Can someone help me identify the 4 small fuse boxes line up on the right side fire wall of the engine bay? Then there is an additional one on the left side near the wipe motor

What are they for?
I am looking for the Radio and Antenna fuse and also the AC fuses ....AC might be #2?

Where is the AC relay located?

last picture is actually from my car. The relays in front of the fuse boxes look different in the various pictures (round and boxy) What are they for?

best, Martin

[werminghausen]

So I found this picture from a German Manual.

#15 are fuses for Radio /Antenna signal (for expanding? meaning second power input for white Antenna Cable?)
# 3 is AC and additional Fan (is this Fan the AC Fan right side indoor?)
#14 fuses for rear window heat and sunroof
#13 fuses for power windows

But the relays in front row are not AC.
So still the question is: Where is the AC relay located?

Best, Martin

[werminghausen]

I was wondering for a long time what the switch at the drier is doing (could be pressure or temperature).
I just found out that it is a temperature switch at the drier and it is [only] triggering the aux fan to come online when the refrigerant is hot (above 62C). It seems not to interact with the AC compressor directly. The aux fan is triggered by the 2 switches, 100C coolant switch and the 62C drier switch.
I found this diagram attached.
Where is this relay for the aux fan?


Martin

[werminghausen]

I think I found the AC relay on the right side engine bay between wheel well and battery down there. It is the whitish box with the rounded edges. In the picture the plug is disconnected.
The blue wire should go to the compressor clutch