Neither of my speedo's work.  I posted some time ago, but thought I would repost this in case someone has recently come across this problem.  Chatted with a guy yesterday that says I need a new M535 & transponder.
I thought it would be the brake controller or CAN BUS....
The Odometer doesn't work.  The spoiler doesn't retract.  The ABS light on the days stays lit.
Any ideas?