I have a retrofit on my SLK320 done by a company called silverice in the UK. It allowed the roof to be retracted etc. using the keyfob. Stopped working recently. Manual says something about removing the fuse if you wanted to disable it and I wondered if the fuse had blown. Looking at the fuses under the bonner it's not clear which it might be. Wondered if there were fuses elsewhere in the car or if anyone had any ideas on this ?