Did you replace battery with AGM (for S&S system) or with ordinary one? On mine battery also died after 4 years (one morning in winter just couldn’t start and all possible errors) no matter that car is parked in garage with above 0 Celsius at any time...
I paid 150€ for a new battery (discount from 190€), AGM type for 1.6 dCi...
2016 White 1.6 dCi 4WD BOSE with Premium Techno Pack, Winter Pack, Panoramic glass roof & autodipp mirror and retractable towbar.
Added ambient illumination, few chrome trims,
Replaced R-Link2 V2.2 SW version 9. 0.34.611, enabled Android Auto and CarPlay (change USB slots)
Maps: Here 2022Q2