Your boot button has fallen out because the small rubber o ring which holds the button componant in place has worn out and broken causing the button to be ejected. The picture shows a complete o ring on the left and a perished o ring on the right. My soloution to this was to produce a cost effective fix fo rthis common problem. I produced a custom machined metal clip which can be crimped into place and will not wear out. This can be purchased at my online shop:
If you have also lost your button these can also be purchased here as well as the spring componant and colour coded button options. The following tutorial shows how to repair your lock using these componants. This repair is suitable for Renault Scenic models from 1999-2003 and all Renault Megane models of the same year.
Step 1: Removing the Interior Tailgate Trim
Step 2: Removing the Lock Assembaly
Step 3: Fitting the Button Into the Lock Assembaly
As in the second picture, holding back the sprung arm whilst holding the button fully in, place the retaining clip into the recess of the long arm. Using the pliers or mole grips, carefully and firmly crimp the clip onto the arm. When in place, the clip should freely rotate around the arm, but not fall away. IMPORTANT! Ensure the clip is secure!
Step 4: Re-assembaly
Place the interior trim in place, thump around the edges with a clenched fist to secure, again you will hear a snapping sound of the clips re attaching.
Again, if you need any componants for this repair, please visit my online shop