I got this car recently and I am currently refurbishing it so it'll become my daily driver.
I noticed the airbag light stays on
I had a look at the airbag system but couldn't find any anomaly so one of these days I'll visit the dealer for a diagnose and reset.
Meanwhile I'll tell you my findings.
Refering to the Bentley E36 manual page ELE-141.
I discovered that on my car there was only a driver's airbag, there were no seatbelt switches nor seat occupancy detector.
These wires are even not present at the plug of the SRS module. As these devices often seem to be the cause of failure, I am happy that I don't have them
So what's left? The airbag itself, the contact rings, the module and the indicator light.
Measured all with an ohmmeter and all looks right. Airbag measures 0.2ohm. The circuit is OK upto pins 10 and 11 of the SRS module plug.
I'll let you know what the dealer says.