The cable that i were onabout is this http://cgi.ebay.co.uk/Renault-Clio-...arts_Vehicles_CarParts_SM&hash=item439ed4009b
However, im not sure whether that is the right cable for you, there are two cables from what i can make out:-
One is from the handle at the top of the seat down to where it folds forwards, this is the one with the white clip which often breaks,
The second cable is the one as shown in the ebay item, which is what the white clip sits into which goes into the base of the seat and into the runners.
just done mine on my 172 Cup - cable cost about £16.50+ VAT & it took about 20mins. You need to roll the seat cover up out of the way after unhooking the elastic keeping it in place then it will all become very obvious! The plastic cover around the handle needs to come off & you'll need an Allen Key or similar from memory. Unlike most of these boys on here I'm no expert spanner man but even I found this a simple job to do. Just make sure you get the right cable as the kid I bought the car off supplied the wrong cable when I bought it!