Be careful jump starting. It's something I've never had to do on any of my Peugeots but they're that full of sensitive components one false move and you've got a large and very expensive paperweight.
In fact when I bought my RCZ it had a faulty head unit and had at some point been jump started (I was told this by the dealer)
The faulty head unit was not an issue as I bought one and coded it to the car off ebay (after about a month of looking and sifting through the clowns who think they're worth thousands of pounds

)
When I took the old unit apart I found a majorly burnt out connector and cable.
I reckon this was from the car being jump started.