Just a bit of info following on from JohnC's comment,
JohnC wrote:Just a bit of useless info on these reservoirs.....according to the parts list, the Atmo one is different to the Turbo, Le Mans & 610.
I am off to my friendly Renault Parts assistants to check if available, and price,
I fancy changing mine as when the Alp was new it had Type C coolant which tended to go brown ( or allowed the metal pipes to rust ) and stain the reservoir. Since then they changed to Type D which does not discolour the reservoir, ( and it does not appear to let the pipes rust either ) and like jonc, I would like to be able to see the level through the tank
The Type C rotted the piston liners and that is there the red water comes from!
This stuff also rotted the 3 main water pipes up the centre of the car. Lovely!