Clock was not working in our w180 2q0s Ponton. removed clock from car and proceeded to open it up. Upon inspection the fuse link had blown probably to power surge of some sort sometime. To make is easier for me I soldered them both back together for permanent joints, thus allowing power to flow through now. Then I put an external inline 2amp fuse, which will serve same purpose. have had clock running for hours now on spare battery, and all is good with accurate time keeping.