SL300/24 R129 ASR and ABS lights do not go out

Hello, have the following problem for some time now. After starting the engine, the ASR and the ABS light remain on. The consumption indicator is without function. After a short time there is a little jerk from the engine and everything is ok again. Also the ASR and ABS lights go off. Also I have the impression that the engine sometimes does not run on all cylinders after starting. This takes only about a second. Then it runs as usual. Can it possibly lie on the throttle? I have heard that there can be problems with this. A few more dates: SL 300/24 year 1992. KM-Stand 182000. I would be happy about one or the other tip. Holger