Right!, after a weekend of research on this bloody issue im going to order the 172 and NOT the 1.6 dynamique rad from the site above....
My reasoning is this :
- Called renault and gave the reg of Ben_P's 172 to get his radiator part number.. it was 7700417175 new OR 7701352903 for an exchange unit
- Then called up again with my reg and the radiators and part numbers on both cars were EXACTLY the same. I asked them to double check and nope, the same.
- I asked them (and 2 other reno dealers) just to check about needing the 1.6dynamique rad for my cup and after being on hold for a while no one had heard of that (obviously im taking what reno say with a pinch of salt but it does no harm to ask)..
- I then called the rad website people (above) and they also linked the standard 172 rad to my car reg too and advised totally against the dynamique rad

- Spoke with Yoz (very helpful by the way thanks) and annoyingly he was certain its a dynamique rad i needed!!!.. argh... he kindly have me the part number for the rad and i was given 7700417175 which confusingly is the part number for a standard 172 rad?!!(same as above).. eh. So sod it, after all of that i'm just going to order the 172 rad and sod it.. it can be returned anyway if it doesnt fit..
Thanks all for the contributions, especially Ben_P for the reg num.
Dave