Only thing I've found like that,in the W124,is used as the "Step Down" for
the Low Speed Auxiliary Fans.

Terrible sets of Conflagration Pictures (In Both W123 Chassis) !

1.I'm gonna start with an inline 1/4 Amp fuse for the Cabin Air Temp Sensor Fan.
('Cannot seem to find anything smaller ,Yet!)
2.1 Amp inline fuse on the positive side of the Auxiliary Water Pump.
(As close to the source as possible)(I'm gonna try a 3/4 amp inline first)
3.The Chassis was fitted with one of the Exterior (Of the Fuse-box) 30 Aluminum Strip Fuse holder for the Cabin Blower Fan.
[Anybody know if these fuses are Fast or Slow-Blow?]
(I think I'm gonna retrofit an ATO/ATC type fuse holder and go with a 25Amp fuse.)(A healthy Blower Fan [Good Bearings and Brushes should draw less than 25 Amps.] )

The Auxiliary Electric Radiator Fans Relays are of course another concern.

Leituviai, has your BR answer...if they didn't get hot and "Relieve" all the
Resistance Stress (into heat) You would've already had an "Un-Authorized
Bar-B-Que"!

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'84 300SD sold
124.128