Start stop automatic and error codes

Hello municipality, it is a Kangoo 2, 1.5 dCI, 90 hp, K9K engine, EZ 2012. Box car (Rapid) The start-stop automatic has not been working for a few days. After starting the engine, the red LED comes in the switch (at the bottom right of the dashboard, for deactivation of the S-S automatic) a few seconds after the start of the engine and can not be prevented from lighting even by pressing the switch. Start-stop therefore does not work either. No error message in the display. D the usual suspects such as temperature sensors provide absolutely plausible values. Air conditioning also switched off. Battery (Varta especially f. Fz. with S-S-Automatik, 70 Ah) is not yet 2 years old and delivers 12.8V at rest, with running engine 13.3 V. The error memory shows the codes: 9268 and 923A. These can not be deleted either. I have precautionally also disconnected the battery sometimes `n half an hour…. should sometimes work wonders. No change. who can vent the “secret” around these codes? Is there any experience to fix bugs? I would be grateful about tips. Greetings, the Löti