190e 2.6 engine codes

[2manyoldcars]

Per an earlier post regarding socket pin ID: pin 3 - CIS-E (fuel injection)
pin 6 - SRS
pin 7 - A/C (HVAC)
pin 14 - MAS engine control
I have the following codes:
Pin 3 =13,16
pin 6 =3,6,8
pin 14 =4,11,13
The codes from pin 3 and 14 mostly suggest disconnected plugs and a bad oxygen sensor. The codes from pin 6 are for the SRS. However, the CEL turns on at lower rpms and goes off at higher rpms. Thus the codes from pin 6 do not make sense. Any ideas?

[dpkreuze]

Does the car have a symptom you need to remedy?

[2manyoldcars]

No real symptoms-runs fine has plenty of power. (The SRS being flagged is a little disconcerting). I’m trying to get the gas mileage up from 22-24 to around 28. It has new valve seals, plug wires, and new plugs, the diaphragm for the EGR leaks and it was disconnected and the vacuum line was plugged, the shift from first to second is a little harsh.