Issues with average mpg dispaly
 

Hey Guys

Im new to the world of owning a MB so please excuse me if I make any mistakes.

I have just bought a CLK270 CDI 2003 and almost everything in it works but I have been having an issues with the after start and after reset section in the information system. It display some things but not other. Where the average MPG is to be displayed all I get is ------ and also where it is to display the average speed I also get -----. All the other displays work and I can see things like speed, range and other things but not these two. Does anybody know why and what I can do to fix it? Any help would be great.
Thanks

Its not only when I reset the trip computer. It is always like this. All I get all the time is ----