Got my Land Rover discovery 2 Wet inside last week starting playing up wouldn’t select reverse was driving a bit juggery m and s lights on dash changed xyz switch still the same only starting when it wants m and s lights still flashing some one suggested bcu just wondering if any one has any other suggestions central locking also doesn’t work

Best to ask in the disco section in the link below. Sounds like the wiring and/or electronics is wet. Water in the carpet will need the carpet lifted a bit to get it out if there's a lot.

https://www.landyzone.co.uk/forum/land-rover-discovery.8/

Pull the carpets out, park in the sun whenever you can and leave the sun roof or a window open about 1/4". It will take a few weeks but it will dry.