Nothing, basically. I've tried Customer Support, Tech Support, my service centre, the head of the service centre... Basically, no one claims to know anything - but they promise to call me back once they know something (which never happens). I've just e-mailed the Tesla director for Europe to try to get some better clarification, but haven't had a response yet. How to hold Tesla to account? Well, here in the UK we do have some fairly strong consumer protection laws plus agencies such as the Advertising Standards Authority (to which one could refer them in regards to their press release about P100D upgrades). However, I don't think it will come to that - I rather suspect that Tesla won't want any (more) bad publicity at this critical juncture (Model 3 delays, "junk" bond status).