Mine has also been doing this since the weather has been getting cold (if temp sensor is generally below 7 deg).
If I turn the ignition on and check the trip/MPG it is there. Once the engine starts the values reset?
I wonder if auto headlights might cause additional power drain. I am not sure if they come on instantly the engine starts? Drain from HID ?
I read lots of posts on this. Some people changed their battery and it still happenes?! Bloke near me who works at Renault dealer on electrics said buy a new instrument module
!
The engine starts so strong though? I've got the jump leads in the boot and am currently resisting buying a new battery.
Higgy.