I have a 1987 Mercedes 190D 2.5 and the speedomter and odometer don't work on it. I was just wondering what I should do or if I should just replace the whole instrument panel? has anyone had had this type of problem, and what's the easiest way to get this fixed? If anyone responds, I thank you ahead of time. I once had a problem like that on a w123 and had to replace the instrument cluster which did not help, so I replaced the speedo cable and now it works.