How do you reset the key fob on a renault clio after changing the batteries?

Try here for instructions (copy and paste)-

http://www.programyourkeys.com/Renault_Clio_II_Key_Remote_Control_Fob_Transponder_Programming.html

Have you looked in the handbook?

laguna
January 2010

I had the same problem with my nissan two days ago, make sure you are using the master key, switch the ignition on for five seconds then place it in the lock position for five seconds, it should then start,(it took me 5 attempts)

Alex Buchanan
January 2010