^^^
The wife said more or less the same thing
The sunroof and steering wheel trick has me thinking damp ingress.
Many years ago I bought a 'spooked' 100 Quattro saloon. The Wife, my Daughter and at least two of my friends neither of whom had touched a drop of booze all swore that they saw a grey haired man sat in the drivers seat of the car the very day I bought it. (In those days I didn't have grey hair, I do now
) I scoffed and doubted their sanity, my come uppance came less than a week later on a country lane about half a mile from my then home at about 3am. the car simply stopped. I grabbed my trusty 'Ever Ready' torch, popped the bonnet had a look around for anything untoward, in the engine bay. The Wife pulled up behind my broken down Audi in her 200 Avant, Her Highness got out of her car and promptly let out a scream! I bashed my head on the bonnet of the 100 and was about to say something very rude, when without warning the car started itself up! To this day the Wife still swears that she saw the same grey haired man sat in the drivers seat. I didn't see a thing, the car never acted up again, and it's breakdown was never explained. For some strange reason no one would go out in it with me. It remained in use within the family up to 2002 without any further 'sightings' It retired to the scrapyard with just under 275,000 miles on the clock. It picked a fight with an Oak tree...And lost