Washer/Retainer Water loss

Yesterday evening, display for windscreen washing system displayed. After operation nothing at all. Frost protection natürlich inside. I filled about two liters after, then the stub was already full. But no function. Today after a ride and warm condition came the message water level washing system…… When I operated the washing function several times with switched on light came very briefly what from the nozzle on the right headlight, then nothing more and then I saw like the blue wet rechrs under the apron ze drained, I think the whole content. I suspect that either the container is frozen or rather a hose leaks or has been pulled off by the pressure. Does anyone have experience with this ??? Does the container sit in the fender, so that you only have to dismantle the inner fender ? Is the container not heated ? Or just the nozzles ? Execution with a premium vehicle ? Design lock and technique from the golf ???