Reading MAS Codes on 90' W126 300SE - X11/4 8 Pin Connector - 50% KOEO Duty Cycle

Hello everybody, i have a question about pulling codes from a MAS Module on a 1990 W126 300SE with the X11/4 8 Pin Connector. My problem is, that when i purchased the car in 2020 the KOEO Duty Cycle was 70% (as it should be). Now it is 50% static, but when the engine is warm it is fluctuating as it should. There are no fault codes saved in the CIS ECU, so now i thought that it would be interesting to know if there are any in the MAS. But the manual only states that i need... Reading MAS Codes on 90' W126 300SE - X11/4 8 Pin Connector - 50% KOEO Duty Cycle

Hello everybody,

i have a question about pulling codes from a MAS Module on a 1990 W126 300SE with the X11/4 8 Pin Connector.

My problem is, that when i purchased the car in 2020 the KOEO Duty Cycle was 70% (as it should be).
Now it is 50% static, but when the engine is warm it is fluctuating as it should.

There are no fault codes saved in the CIS ECU, so now i thought that it would be interesting to know if there are any in the MAS.

But the manual only states that i need...

Reading MAS Codes on 90' W126 300SE - X11/4 8 Pin Connector - 50% KOEO Duty Cycle

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