When I was on holiday recently in Northern France and Belgium, I had the same issue of having multiple warnings, which would then clear themselves. The first problem was just I reached the Le Shuttle terminal in Folkestone, when I had a low tyre pressure warning. However, none of the tyres showed any signs of being deflated, so, after a couple of days, I reset the warning and it never occurred again. However, a few days later, after about an hour of driving, I suddenly had a string of warnings such as the cruise control not available, low tyre pressure system not available, some of the assist functions not available, etc. When I restarted the car after I had parked it to visit somewhere or an overnight stay, the warnings went away, but a little while later, the warnings returned. This kept on happening, with the time before they occurred getting shorter and shorter. Since I returned home, this problem has gone and the car is back to normal. Yesterday, I had my car checked over by my local garage and no faults were found. So this is a complete mystery to me - the only difference between when was on holiday and now is there's no luggage in the boot. The other thing to mention was that despite all of these warnings, I was able to drive the car with no issues with the engine, etc. I've had the car since new in 2016 with about 57,000 miles on the clock, and it has been brilliant in terms of reliability. I would appreciate it if someone might have an idea of what was causing it.