Citroen DS5 rough running and stalling

I had similar symptoms on my old Opel Astra. The diagnostics pointed to a faulty coil pack as well.

What were the specifics of the issue you encountered with your Opel Astra? Were the symptoms identical, and did the diagnostics definitively identify a defective coil pack, or were there other contributing factors?

Yes, the symptoms were identical. Replacing the coil pack resolved the issues completely, although I would suggest going to the workshop and running a dedicated diagnostic protocol for Citroen to be sure.

I had the vehicle inspected based on the recommendation. A defective ignition coil was identified, caused by a faulty connector. Replaced the component for 95€, and the symptoms are gone.