Funf AG puts us all on by assuming we would fall for something of such utter simplicity. We all know that we are suckers for high technology solutions to simple problems. The German solution would utilize an array of levers, sheaves, cables and proximity sensors along with a prime mover required to left the cover. Safety considerations would of course be paramount in conjunctions with lockouts, i.e. there would be no access to the spare area unless you actually required a spare as dictated by the computer sensed height algorthym being out of skew.