Hello all, I hope you have another tip for me. I’m on troubleshooting an A23 City lion. The problem arises as follows : the vehicle does not start sporadically. After an indefinite time it works again. If the error occurs you hear the relays working behind the driver. Nevertheless the start lock relays were renewed, the starter, as well as the electronic part of the start switch also. No errors are filed. In addition we have auc h already exchanged the D-Mux with one from a sister vehicle. No success!