First questions… W123 240D Built 1979

After I have now my darling in the garage I have made a list with things I want to do/must to bring everything back to work. 36 years have of course left traces. For all those who have not read my “return post”: I bought me w123 240D from 1979. Probably still the first model, because rabbit ears. Is not at 79 so easy … And now my questions, which have so posed themselves during the first driving and inspecting: 1) Was the ZV serially with the vehicles? If I have one it does not close, or has no function. However, all locks are also very difficult and the buttons are not as good as not to press. I type on 25 years no care and resin. I have to look at myself in the spring. 2) Does the fan run on the engine with the model IMMER with it? With my previous W124 200D it was not yet the case that I had to keep up with the light. In the current W123 it is always funny. Maybe the thermostat in the bucket or the fan is simply set on continuous plus. Before I did not want to ask for the light check. But I did not have to have to give a lot of time to ask for the light.