1992 400SE
I checked for any codes in the various W140 pulse counter systems.
I cleared all the codes in the many systems to see which return, but once I got to the SRS (pin 30) I got these codes:
3-Driver Air Bag
4-Front Passenger Air Bag
8-Circuit 15R, Voltage Supply
9-Warning Lamp Fault
It would not allow me to clear any of these codes. The SRS light on the cluster comes on during starting, but goes away as normal & never comes on while driving.
Does anyone know how further diagnose this problem? I don't wanna find out I don't have airbags in a worse case senereo

(knock on wood that it never happens).