Strong jerking with cold engine

Hello together, drive a Smart Cabrio from 2002 for a few weeks. Unfortunately, it is very hard when it is cold and the switching operations are anything but soft. As soon as the engine is warm it turns on buttery soft and the hopping is history. I just had to renew the corroded cable from the tap sensor. Did the engine error light on until then. Does anyone have a tip for me? Thank you in advance. Ronxy