What could be causing the trip mileage counter and clock to reset on a Renault Scenic 1.4 04 plate when you start the engine?

The trip mileage counter and clock resetting when starting the engine on a Renault Scenic 1.4 could be caused by a weak or failing battery, which may not provide sufficient voltage during the engine start-up. Additionally, issues with the vehicle's electrical system, such as a faulty ignition switch or poor connections, could lead to power loss affecting these components. Another possibility is a malfunctioning instrument cluster that may require diagnostic testing to identify.