Need suggestions of what the issue is as this was dangerous last night . I was driving along the motorway and around town last night when it was raining. And the rev counter and speedo just went all over the place with it going all the way round on the dials and it coming up I was doing 150 mph when clearly wasn't then nothing and then 70mph when was stationary lol. It seems my car comes up with 'checking' then dials go all over. But considering I don't know my true speed at times would love to know if this is a loose connection or anything

this is probably a cluster fault - i can repair it for you for 65 pound plus 12 pound for the return shipping costs from Netherlands to UK.