Join Date: Feb 2007
Nominated 16 Times in 67 Posts
TOTW/F/M Award(s): 28
Thanked 5,199 Times in 4,711 Posts
Similar to many modern cars (not just Renaults) the door locks are electrically operated (sadly the days of cables and string are long gone). I suspect you may have a lazy or sticking motor solenoid which needs attention. So it looks like you'll need to remove the boot liner for a looksee.
Also check the door drain-oles are clear as water ingress can be a problem especially on the Tourer model.
If the temp gauge is erratic it may well be worth checking the connections to the coolant sensors which are usually positioned around the thermostat area
Currently in madnoel10's garage:
Honda Civic 1.4l