The problem here is in the US we do not have the 202 /C200, so we are using info on 202/C220 in hopes that the systems are the same...
So, I would check a few comparisons and that may narrow it down.
First, the drier is a small tank that the refrigerant lines go to near the front condenser [ near radiator] That is where these switches are located [ on the drier]
If you have this sw
http://catalog.worldpac.com/mercedesshop/sophio/image.jsp?title=A/C%20Pressure%20Switch&url=http%3A//img.eautopartscatalog.com/live/R105475741ACM.JPG
you have the variable sw that SB is talking about and that feeds the Control panel the info for the fan.
And if you have the pigtail sw , then it controls low fan and can be jumpered to check the fan circuit [ like the 124s]
Here is that one
http://catalog.worldpac.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=2AO123CS42CN0N6R80&year=1994&make=MB&model=E-320-001&category=R&part=A%2FC+Temp.+Switch
See what you have on the drier and that will tell which system you have.
Also, I noticed that you mentioned in a post that low fans circuits are controlled by /ac and coolant temp..The coolant temp sensor is the blu 2 wire one and that is for HIGH fan..it has nothing to do with the low fan and is a completely different circuit and relay. [ just so you do not confuse the 2]
Low fan is for airflow assistance to the condenser when the a/c highside pressures or temp get into a danger zone..but, if the a/c system does not have the proper refrigerant level, you will not see a low fan b/c the system never gets to that danger zone ...it is not capable to get there b/c it does not have that high pressure capacity if the refrig is level is low..that is what makes low fan diagnosis a little tricky and why gauges to monitor high side pressures are used.
See what you have down there . If you have the pigtail setup, just jumper and see if fan comes on..if no pigtail, that test does not apply.
I would also do one quick check that is common on No low fan complaints.
Behind the headlamp [ left] is the Resistor that drops the voltage to accomplish Low fan.. It is common to see the wires from the relay going into this Resistor burn off or make a poor connection b/c of failure from heat fatique..[it is a ceramic resistor and runs hot/dissipates heat ]
A quick check there may save you a lot of trouble..
http://catalog.worldpac.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=2AO123CS42CN0OD3FJ&year=1994&make=MB&model=C-220-001&category=G&part=Aux.+Fan+Resistor
If you look at that schematic SB posted , that part will be R15...that is needed for LOW fan and if wires are bad here , that is your problem. It is not used in the HIGH fan circuit.