Good day together, Andzwar my double R shows the error Lamp(sometimes Lampf) for a time. There I would have to check the fuse and possibly change a bulb. My question is, however, whether it can be that with this lamp error, my horn does not work? I searched a lot, but only read that it is the left amatur/control switch. I had already changed a new horn, still no function. Since someone has perhaps had experiences with ? The control switch as a whole costs 180-300€. Hope this is also a bit cheaper Thanks in advance Daniel