Hi. Could someone send me a pic of the horn's location as well as any instructions on how to disconnect it? I've pulled the fuse in the mean time. What happened yesterday was that I washed the car, including hosing it with a Karcher sprayer and shortly afterwards the horn just came on while the car was completely switched off. I've heard that water ingress to the EM system may cause this kind of thing but obviously I avoided spraying in the engine bay. I have had another apparently electrical problem (now fixed with a new key) as reported in another thread, so I'm beginning to wonder if there's a wider problem. Thanks.