Today the tyre pressure control light lit up. I checked the air pressure at the next petrol station and see there: only 0.3 bar on the tire. Since it is a runflat tire I did not notice anything of it while driving. So I pumped it up again to 2.3 bar and left the car for about 6 hours. After that the tyre pressure had dropped again to 0.3 bar. Again pumped up, left 4 hours standing – pressure stopped. About 30 km with it – pressure has always stopped Externally, there’s nothing to be seen about the tire – what can it be? Above all, what would you do now – if I drove a correctly pumped tire to the tyre dealer, he probably can’t help me either, can he?