No start all the time now & key is a little sticky in the tumbler now too.

There is a single pin connector by the brake booster in the engine bay. This is the power connector from the ignition switch to the starter's solenoid. With the key turned to position "II" (run)...there should be +12V here right, BUT I am only getting +3.95V (obviously not enough).

I disconnect this connector & applied +12V to the connector that is connected to the starter's solenoid & I could start the car this way.

So can I assume this means the no start problem is on ignition switch/tumbler side rather than the starter????

EDIT: Car is 86' 190E 2.3L