Yes i have the FSM for it
You have a 2 wire iavc, this one does have 3 wires its an older kjet version (2) from 1985/9 its kjet 3 with a 2 wire steppermotor.
The car is from 1985 January, but it does have A/C that why it does have an iavc, otherwise it would have an manual control you could adjust.
But this car is a bit strange, because it does have an cat with lambda control (no aftermarket)
Also it does have the TSZ ignition, not the EZL with the adjusting knob.
The (one) wire tempsensor is fine, the idle mircoswitch works (but does not surge as the FSM suggest, rev up to 2000rpm and press the switch)
The potmeter was way out, 1.4v on idle, should be 0.7v, i adjusted it a bit, but didn't do much, only the rpm stick a bit more when i depress the throttle...
I'll replace the potmeter with an aftermarket soon.
Vacuumleaks could be, i plan to remove the injection system for an close look, i did spray with breakcleaner and didnt notice anything.
And yes the starterlockout from the automatic goes to the kjet ecu, i haven't tested this yet,
Maybe i should place an 15k resistor (-20 degrees) to the tempsensor to see if i get the 1200rpm idle
This car will replace my diesel because of the tax sigh.
But its an projectcar, it got the important options, klima, tempomat, 4 elec. windows, ABS, seat heater, lotsa KM 275.000
For a price i cant even buy an bicycle lol.
An meet could be nice, I can bring my elec. schema's for all w201 models and options, you can copy your 201.018 from it (i have them all from Mercedes on paper vol 5.0 and 5.1)