There is something funny going on with the speedometer on my 2002 450ES. Whenever it sits outside for overnight, the speedometer will be blank for about an hour or so the next morning and then everythings works great for the rest of the day. I can park in the garage overnight and won't have any problems. I thought it must be a moisture related problem, but I have driven it in the rain, power washed it, even just held the water hose on the speedometer and it works everytime. Leave it out overnight and it blanks out. Has anyone else heard of this problem? Thanks.