My 2005 renault scenic radio dash display and remote stalk do not work

SOURCE: Renault Scenic Missing and cutting out

could be spark plugs coils, we have had this various times

SOURCE: my renault scenic radio says code i am unable to

Hi - the way to enable code mode is to turn off the radio - then hold down 2&5 & press the on button - this will bring you into the 0000 code mode.
Regards Paul

SOURCE: Megane Scenic Dash Lights

Possible accesory power relay staying on due to an internal fault. It is above the fuses in the glovebox. Try sitting in the car, locking it then giving the relay a tap

SOURCE: My Renault Megane Scenic S reg heater is not working

Most likely to be a faulty resistor block, which has 3 resistors and a thermal fuse controlling fan speeds 1,2 and 3, maximum speed 4 by-passes the resister block. It may also be poor electrical connections to the resistor block caused by overheating. Renault ask for approximately £350 to carry out repairs, a replacement resistor block will cost £50. If you decide to carry out the repairs yourself, be advised that if you are not competent to carry out such work you, could cause electrical damage or worse an electrical fire.

SOURCE: renault scenic 1.6 16v. occasionally will not start

This could be a possibility of a bad connection to the engine speed sensor or in other terms flywheels sensor or TDC sensor located under the thermostat housing screwed to the gearbox by two bolts, when the problem occurs try playing around with the connector connected to the TDC sensor and then try to start it, renault has a new modified connector and TDC sensor on the market.
I hope this helps.