Timing belt change Megane 2 dCi

Servus, I decided to change the timing belt at my Megane 2 CC 1.9 dCi, built in 2007, key number 3333 AGK. Does anyone know exactly what needs to be renewed? Timing belt set with WaPu and V-belt set if necessary I already know. Do you also need to change the crankshaft belt disc? I don’t want any noises after that, because I saved in the wrong place. Is there no belt disc in the camshafts that you also have to renew? I found a free workshop and in advance asked if they have the necessary workpieces: Arretierdorn etc. Is there anything else to consider? Is the change as complicated as I have heard from others here? I thank you already. Every answer will help me. I am very curious. My car is running very well. No noises have occurred to me. But the car is 9 years old and despite a complete checkbook, I have no indication for the change of timing belt. Car was bought used. And another question if I glow The automatic oil transmission, you don’t have to change regularly? At the last maintenance at Renault the transmission has been tested. Thickness I believe. And because the transmission switches through cleanly, the Wekstatt thinks that I can do without oil change. Is that true? Barbat 4 17. September 2016 00:44 DE 90537 Feucht Megane 2 cc 1.9 dCi, EZ 08/2007