Glyn Day

(BMW saloon 320d, 2012 F30). Last night I arrived home at 6.30pm, .... 3 hours later I went out and noticed the front and rear lights were on! Nothing else in the car worked, absolutely nothing. Not the radio, interior lights, start button, dashboard, media screen, all LEDs out, completely dead. The front and rear lights would not switch off so eventually the battery drained. When I put the car charger on the lights lit up again and so no charge getting through to the battery. I disconnected the lighting control module and the reconnected the battery charger and the lights came on! The rest of the car was still dead. Can’t get into the boot to check the relays as no power but when the battery charger is connected there is a clicking sound coming from inside the boot. Can’t move the car to get a ‘jump start’ as it’s automatic and no power getting through to drive mode select stick. The car is absolutely dead other than the front and rear lights. This is so weird! Can anyone help!