its the tyre pressure sensor
To change the dashboard light in a 1995 Renault Laguna, first, disconnect the car battery to ensure safety. Remove the dashboard cover by unscrewing the necessary screws and gently prying it off. Locate the bulb holder behind the dashboard, twist it to remove, and replace the old bulb with a new one. Finally, reassemble the dashboard and reconnect the battery.
After a repair has been made on a Renault Laguna the service light will need to be reset. To do this plug the diagnostic tool into the computer and reset the light.
Renault Clio 2 electric problem with dashboard, THE LIGHT ON THE DASH IS NOT ILLUMINATING
changeing side light bulb
To turn off the hazard lights on your Renault Laguna, locate the hazard light button on the dashboard, typically marked with a red triangle symbol. Press the button once, and the lights should turn off. If the lights do not turn off, ensure the vehicle is in the correct ignition mode and try pressing the button again.
Dunno for sure but there's a very useful explanation for lag 2 air con control unit light on Renault forum, with pictures! worked a treat for mine.
Behind front off side light in engine bay, in Laguna 11 Hatchback 1.8ltr
How to remove drivers' side light cover
Try asking at www.renaultforums.co.uk :-)
Alternator bad or wiring fault to alternator.
time for a service!
under the engine beside the paseneger wheel, blue connector