I got a similar issue today.

four yellow lights (abs, 4x4, tyre pressure!!!, and one more light) came on and speedo does not work.

also while driving ~ 40mph the parktronic sensors were working because the speedo was showing 0

is there any damage being done by driving it for 1800 miles? I really would like to drive it the service where I always fix it...I can live with speedo not working until then.