How to switch of airbag and service light in 54 Renault megane?

That's easy...

If you have a lot of money go to the Renault Service center to have it reset.

On the other hand, if you dont have a single penny but u have some tools then do the following.

1. Remove Negative battery terminal for about 15minutes to allow the resistors/capacitors of the faulty light to turn off.

2. after 15 minutes put back the negative terminal and start your engine.

3. Dont be shocked if no lights appear...

4. Turn off your engine and turn on again then your problem is solve.

---MaxiExtreme-