i had one preset visualsettings.dat for server side which brighter ELS but it will affect car interior light became brighter which lead to unable to drive safely with First Person View at night… Which value can lower the brightness of car interior? im not talking about Extended Texture Budget.
visualsettings.dat (42.7 KB)
Engine On 
Engine Off
The issue is car.interiorlight.intensity and car.fatinteriorlight.intensity in your visualsettings.dat — both are at 1.75, which causes the interior cabin to wash out when the engine is on.
Three values to change:
car.interiorlight.intensity 0.65 # was 1.75
car.fatinteriorlight.intensity 0.65 # was 1.75
car.dashlight.intensity 0.30 # was 0.50
This quiets the interior light cone without touching your ELS siren intensity (car.sirens.*) or headlight values (car.headlights.global.*), so your emergency lights stay bright.
Place the corrected visualsettings.dat in your server data/ folder and restart. No meta changes needed.