Yes i agree with you.

my chassis is the W124 031 never sold to the states or GB i think?

One thing i can se at all my metal boxes behind the battery is that on the later model the ASR and ABS is built in the same metal box with 2 plugs/cables going out on the top.

On mine the VDO CC and the ASR metal box is built together with only 1 cable going out of the box.
The ABS box is alone in mine

I also read tons of this material about commen errors,
OVP relay i have one in spare i tried to change with and it was not that either.
The fuses has also been turn 10 times and changed out with new ones.
The ABS lamp is not on, only the ASR lamp is lit up.

So i guess some of the codes i read out acturely where old codes.
Anyway they are all gone now and have never showed ever since.

But still i got the ASR lamp lit up and the system is not working together with the CC.

In my way of finding the error i have spoke to many mercedes people, and come op with that this ASR system on the first M140890 engine is a realy rare option not many of them have.

One mercedes dealer here told me when i asked for a error codes read out, that the W124 never was fitted with this system so it was not possiable so when i showed him the 16 pin plug he said that was just an preparation for it, but it was never compleeted to work.
When i finaly find Jims great home brew diagnostic tool and built it my self, then i went to the same gye at the mercedes dealer and showed him how it should be done.
He was very surpriced and had never heard of it.
So i went to 3 others mercedes dealers here in Denmark with the same resault,,, no one knowes anything about the W124 here any more i guess, so it is deffently not there im gonna put my w124 for a repair of this ASR system, wich all by the way mentioned i should by a new control unit for (hold on) 2500$ no way im going to trick me in to that change, because they wont take it back if it shows NOT to be the problem (great service ) if they mount it they will charge me another 350$ for it.

This is a freak show i think where im the klovn in the midle of there freak show. Sad it is the way they conduct buisness i think.

Well as mentioned i have also read a lot about low voltage van give huge problems, so i also went change the battery and the voltage relay.
both before and after the car ran fine and with Ignition Off the voltage was 12.4 btoh before and after
With the Engine On the voltage quickly climb to 14.6V both before and after the battery exchange and change of the voltage relay/regulator.

I have realy been every where to try fix the problem, the only thing left is the controler unit (2500$) and the EA (unknown data and cost)
Any one know the part number and price for the EA to this model Im realy interested to hear about it