DS3 Alarm Malfunction

I own a DS3 and had a similar issue. It was a misconfiguration related to alarm control. Do your indicators flash when you lock the doors, even when the alarm isn't sounding?

The indicators do flash upon locking. Could you elaborate on the specifics of the misconfiguration?

Flashing indicators were a key symptom for me. I don't know the technical details, but the alarm system was coded so the optical locking system, and indicators, prevented the main alarm from activating. The fault code will provide details. I'd suggest a workshop.

I visited a workshop, and the alarm system was coded to activate the optical locking function. Recoding the alarm fixed it for 45€.