The OVP shouldn't have anything to do with the SRS light.
Two things do jump to mind though - worn/dirty contacts or slip rings for one, or worn brushes in the alternator. Anytime the light is on the SRS is non-op. Voltage below 10.1V will trigger the lamp as will a sticking spring in the contact or a worn spot on the slip ring.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.