New shape Renault Megane Service light - mchampson
Is it possible for me to reset the service light without taking it to a dealer?
New shape Renault Megane Service light - Altea Ego
Not with out a renault clip (the diag tool)

Given that doing so without rectifying the cause of the light (ie have it serviced or the problem resolved) will invalidate your warranty - why do you want to do that?
New shape Renault Megane Service light - mchampson
Warranties only last for 60,000.