A few months ago I bought a new battery for my 2005 525d sport, had every single fuse in the boot and the dash checked and all are fine. However since the battery change my horn has failed to work at all. Also, when I unlock the car and turn the key to start the ignition the alarm sounds in a continuous single tone. I have to then turn the ignition off and wait a minute or two then turn the ignition again and the car starts fine. It will do this every time the car is left locked for a period of more than 5 mins. I receive the HIGH RATE OF BATTERY DISCHARGE nearly everyday.
Any advice would be of great help and also if anyone is a mechanic and based on this information you could give a rough price for fixing the problems please get in touch...thanx.