Hello, I am driving a used VOLVO XC90 2 D5 AWD R-Design EZ04/2016, which a) does not start automatically at Stop and go; b) can no longer be started. In the VOLVO contract workshop meanwhile – the start switch and – the start battery were changed. After several days of charging with a CTEK 5A and 1-hour drive, it is a lucky game whether the engine can start again. Where do I start with the troubleshooting?