HEY, I GOT THE CAR RUNNING AGAIN!!!
I tried again and still had the same problem, then tried another simple suggestion from earlier in the thread: I tried to start in N and it worked!!!
So I assumed it just wasn't fully in P and when I had a closer look I found a little sea shell that my girlfriend had found on the beach the other day, that had fallen into the gear selector thingy befrore P!
Bit embarrassing really... but at least I can blame her now
I still want to see if it keeps on working, because it might be a combination of the problems suggested, so tintinmt, it would still be great if you could scan the scorpion instructions for me! Thank you!
Thank you all!!!