Ok so last night i hit a rather large pothole getting on the M275, and then my speedo hit zero and wont move. After around half an hour it suddenly rose as i accelerated to 70 then just stayed there, even when i stopped. tapping the glass made this go back to zero, but its still dead. I've had the whole dash out today, checked the connection with the cable and cant get it any better than it is but still nout :surrender: been told new speedo cable and its still in ok at the gearbox, any thoughts? has this happened to anything else? Cheers, Alfie