So I was looking on these forums to find out how to disable cat heating on my med17 ecu. No info.
I ended up figuring it out so I'll explain what I did below, maybe it'll help someone in the future.

Maps for Operating Conditions For Catalyst Heating Request When Cold Start:

TANSMNKH: Minimum Intake Air Temperature For Enabling Cat Heat

TUMGMNKH: Minimum Ambient Air Temperature For Enabling Cat Heat

Both of these maps were set to -9 C in my file. I just changed them to 70C (158 Fahrenheit) , because ambient nor intake air temp will ever get that high.

Maps for Operating Conditions for Catalyst Heating Request:

RLMNHSPKH: Minimum Air Charge for Requesting Homogeneous Split for Cat
Stock file was 7 g/s, I set this to 350 g/s, as my car only runs a max of 270 g/s currently.

TMMNHSPKH: Minimum Engine Temperature for Homogeneous Split Request for Cat
Again this was set at -9C So I changed it to 150C, which the engine will never get to.


I suppose you could also turn it off by changing CWBBKHAKT:  Codeword Catalyst Heating Request When Cold Start
However that is set at 9 in my file, and I have no idea what to change it to in order to disable it. Not just changing a 1 value to 0 like it appears to be the case on the ME7xx ecus.

I hope this can be of help to some people, if there's a more efficient or better way of doing this please feel free to add.
Also it should be noted the only reason this should be done is if you are cat-less.

Just max out FHOKH, no need for any of that shit.