Hi All Could anyone please help, A few days ago i went to start the range rover sport 2008 put keys in all lights came on i waited for the glow plug light to go off then turned the key and everything went off the dash lights ,radio central locking and alarm i disconnected and reconnected the battery and all was fine then the day after it did the same i took the key out went inside to get a spanner to disconnect the battery again has i came back to the car all the lights came on by there self i then put the key in the ignition and it started fine its done the same a few times since Thanks for your help, Steve

Clean the terminals with a wire brush and on the posts on the battery also.

If theres anything screwed onto the positive terminal make sure it cant be wiggled, as if its loose vibrations can move it around.

get a lend of a battery for a few days to see if it cures the problem.