There are a couple of tricks you may be able to try. I have a laguna so excuse me if I am wrong..
Firstly try inserting your card key with button at the end of the right hand stalk fully depressed.
In the laguna this will run the dashboard test ( you will see needles moving and display runs through every feature if you press the aforementioned stalk button again )
To reset the dash and hopefully return to normal imperial measurements just press the trip reset button on the dash..
For the espace you can do the follwing
Helpful hint: To change the digital display from mph to kmh and back again do the following (from Dutch handbook): Have the Renault card ready in your left hand but don't insert it yet. Press and hold the computer function button on the end of the wiper stalk. Insert the card and start the engine. The speedo will flash for about 3 seconds. When it stops flashing, release the computer button and the speedo and the cruise control switch to Km, though all other functions remain in miles. Simply repeat to change back to miles.