Choke can only be half pressed in. Car does not start

Moin, I have the following problem: the Choke-Hebel at my Ascona C Built 82, can only be pushed in half and the car does not start any more. I drove to work this morning still quite normally, everything was good. I drove with the drawn Choke to work, because the track is quite short and I was in a hurry and I did not push the lever back in when I turned off the car. Grade when trying to start it I heard that the Choke was still a The battery was dead shortly afterwards and the bridge cable didn’t use anything. I looked at the lever on the carburettor and everything can be moved well. The Bowden train runs free as well. I am now a bit helpless, because I am not driving an old car for long and I have only recently been dealing with the technology. n must. Is it because of the cold? Can’t imagine that 0 degrees already take care of it and this morning he also jumped. It was probably the very short distance he doesn’t like, right?